Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9949e33a2c4a8fa…

MALICIOUS

PDF

116.6 KB Created: 2021-06-29 02:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4f0fc8ed125a66d33365b09180effdc6 SHA-1: a4ed76db043b1904a5d4c34b96c7164522258872 SHA-256: b9949e33a2c4a8fa4623093a008c53bb85f2e430be7c429710f8b5752e233450
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

This PDF document exhibits characteristics of an advance-fee scam, presenting a lure related to lottery winnings or parcel delivery requiring payment. It also incorporates a callback phishing lure, prompting users to call a number in response to a supposed billing or security issue. The presence of embedded JavaScript and numerous links to potentially compromised WordPress sites suggests an attempt to host malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://atut-biuro.com/uploaded/file/25663880341.pdf In PDF document text
    • http://zhuoer.ltd/userfiles/file/bexomopuso.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/05f0f4669a572cb404b6412a992240fc/53216863788.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/ponupemodawuvagelitenun.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/kadipupataruvoforila.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8046edd73a---fepedijimuxudivabas.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/19727528386.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/fibuwimibu.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/bosafuzaxelabut.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/733a87a4dfbc7dd56c61f72b14466bd5/81318441717.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16087c5ba29f09---xomazozepatovopazupas.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/bf2e0ea2787f0a17ac52a0f0f407d718/zinetiwa.pdfIn PDF document text
    • https://hissekurban.com/resimler/files/xozulejitugapivet.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba602eb6beb---27925568721.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/vuxeganakopujiralelawuju.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/vasex.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/42288831368.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160848ca69163b---xixesijojelegigipuxozomi.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b311e5454---30999460810.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/9381951ab3d3dab5dbcd6e74b02a3b2a/70430825174.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608686e94c1c6---25765098247.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be4cddeccde---68785075118.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c171d560401---nisegededepo.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1bb1aeb68---gexoji.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/l9am8h0jr5fo212jotddq5dlea/buzujusisagabamelog.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/55199668399.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d98f4a203f---46364648733.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=list+of+ppp+loansPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000166bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166BC 17520 bytes
SHA-256: ab918457cdc096bb3517f85762bfb66446164493a765d0a48d732d72c790bad0
font_01_sfnt_off000194ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001ad03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD03 10076 bytes
SHA-256: 6fa11c88aaf4b58187c55cf1ef6fbff70c0e2a43598a3d8e1826379ed7af11ae

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