Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cac0d6cb3f5c02d…

MALICIOUS

PDF

55.8 KB Created: 2021-06-06 06:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59dafe1b9df35bd345d2878d8190525d SHA-1: b66be75d5dc6bf456edb11e55623656437a77486 SHA-256: 3cac0d6cb3f5c02dc18258a5b7fcaede003e6bc465b9aa67df29d5b77955c006
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document contains a link farm pointing to numerous compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. The presence of external URIs and link farms suggests an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://queure.ru/uplcv?utm_term=how+to+disable+f+key+shortcuts+windows+10
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cfa7e813e---kofiganodoxufifewilofiz.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/2287f46d3afcef4556b4c2f6d548dc7c/27204651785.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609644e76d983---12133119631.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b604f19a35c---32452571054.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a2abbf1fe---garodewo.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/fb2b01dfe88c14071e112cee7759377a/butezutikajalodulebavit.pdf
    • https://alnahamgroup.com/userfiles/file/jigefubevewora.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb03d5ab07---89284449703.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082043ccb074---febiro.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/rpkkpnskakl197pr3d4ctn8g7l/16584563608.pdf
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/mufusid.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607818ae830cf---badenukorixuponosu.pdf
    • http://aarogyamedico.com/userfiles/file/likuligejafuxirakepajoki.pdf
    • http://clarksville.net/wysiwygfiles/file/65951773387.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/ba089eb3003204e977d920a6843b812d/15209958138.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cff7.bin
b36f31aaef1b1ea5677e50cf45e4357f121e13377b4643c242d8c2c1395f429e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF7 5664 bytes

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