Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddbbe217831eda2…

MALICIOUS

PDF

82.1 KB Created: 2021-09-03 15:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0930d83536e0dea24a042d79276ed4c8 SHA-1: e4d56d9b44df6ddbf1f21a276d8be5a92fc65836 SHA-256: 2ddbbe217831eda2f1fa8f5f6070e9c80b81fc9a95f1b2b2f6892701e58adcc4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The embedded JavaScript likely facilitates the redirection to these malicious sites, contributing to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78644377389.pdf In PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/7p36v55vru1nlk59r00epur7b2/pisubiniterozexafux.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b029894fa7---xijimemikokoretivanivuw.pdfIn PDF document text
    • http://sun-eko.eu/files/file/98569284977.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874ea956f5b---29262887905.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/d26c5e93de4c8e2a05efd232fb591227/risejetemuf.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/gudaravomutenigedume.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb3e3fd2196---24183248134.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/27411975547.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/222ac65c63a248fca3c5865a52be44db/7148557554.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/76795423463.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/de4d52303deb678272bd36d63bda3ba6/43669103650.pdfIn PDF document text
    • http://airfa.it/userfiles/file/41416368941.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/ee71756f5ba3885fe0eddc6f7892f6ee/3237477742.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612116ea82203---99938192987.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89bb6e0746---zekunotopapibajabe.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/bebelawod.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/davubesilukivem.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/148be56f986bee7beeff9d70269cdd40/lavul.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/wagug.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/japixiji.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a39a82dd0e---buluvasitokirup.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/wutetijupukewanekebibeto.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cd792f1ef99---supalemasunulotasin.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1611688892a7ca---66551981420.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=xps+to+pdf+offlinePDF 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_off0000de0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0E 17480 bytes
SHA-256: e92e0310b3fd73fb6c4cb07cb26e90306491f97e1c107094664ea5a760c4e978
font_01_sfnt_off00010c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12430 10236 bytes
SHA-256: db6ccf932174c336602a30b0705f05597bea0ca13aab029d6265736115b3e069

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