Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eeb8208d11d6397…

MALICIOUS

PDF

87.5 KB Created: 2021-09-18 19:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2d249b1a0bf0416d7ebbb2a5d779dee5 SHA-1: 3f930cfa3e507e1f53224be245fb92d2526e6abe SHA-256: 9eeb8208d11d6397662484e9a5c56b91f1e88d97f6fc11f6b7488069f6d1a283
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, many of which point to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious files. Heuristics indicate a high likelihood of maliciousness, with ClamAV detecting it as 'Pdf.Phishing.Trojan'. The presence of a 'download button' lure and callback phishing indicators further support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://drafthe.ru/uplcv?utm_term=super+vip+vpn+pro PDF link annotation
    • https://thietkeweblongan.com/upload/files/lavikuvuxiwugijevebivudo.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/37800764081.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/xupisuzosanopitu.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16144202be920d---fozesax.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614604ba22f31---2920177142.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16137d27857990---sujofenurula.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/15377608478.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/jutidesusit.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1613983c66ad2a---80443845256.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/14935817484.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/csbln9h31jtmrv6h2c6l71l452/57159011059.pdfIn PDF document text
    • https://pcetravel.com/files/file/rokusaxosuxesorulum.pdfIn PDF document text
    • http://airfa.it/userfiles/file/62103721932.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/13250155103.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/dusosarimexakom.pdfIn PDF document text
    • http://smingames.com/ckfinder/files/76148236530.pdfIn PDF document text
    • http://marisqueandopremios.com/campannas/file/74784154155.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/96174307067.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/bofemukages.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/i6eagie289qttic2msro6kam10/28160297494.pdfIn PDF document text
    • http://jszl-rolls.com/filespath/files/20210918023533.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/dibijobepaxinonevezaf.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/jamoloxejewuwopafulolodid.pdfIn PDF document text
    • 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_off0000ecc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D6 20216 bytes
SHA-256: d34db3640c80c991f800aa361900e64e536cbd946e15147d947adc7937427125
font_02_sfnt_off00013a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A96 10012 bytes
SHA-256: 606a5f48b8b707ce955755040e3ff4b7dae8c5fe0bf4affd101cb325be145b2d

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