Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd483a8a3d18b7a…

MALICIOUS

PDF

65.4 KB Created: 2021-06-10 15:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a895a865406f67e9a571e4d3d56cf743 SHA-1: 74db0b054ecbc94b08657f129b1a717a1ac0a124 SHA-256: 9bd483a8a3d18b7af21eafbec046fbb3d6eccaeef4c48e1e79654229dd3f9739
154 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm for malware distribution or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery disguised as a game download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8377

Heuristics 5

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=gta+5+ppsspp+download+iso
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5c2c8bf95---73909878564.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/06d9aa451166e6eeb7eb789a53dfa704/vijulojanekem.pdf
    • http://fobosgrunt.ru/files/ckfinder/files/3536075642.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/47fff4c226fb6ed4fdca2d10d8149c47/55016775531.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/ouh5nnve2tm6d435gq35dhjf75/kujeruladisex.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/0b8a6c32dfa3d2a641a41fc22cbf1ee9/sazurajegalobupipimadoza.pdf
    • http://humanitool.ru/userfiles/file/22383927213.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1524cf68e---36578777817.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076354f614a5---611983727.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/222962e51a0eda877e862e9a57fe6a5f/manatinik.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/0fjm0tf8r16jhgn1go229fvpt7/remidatalaga.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160917cadb76a7---22645848129.pdf
    • http://kingnature.ru/files/files/kowoz.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780b587bf17---zolopubududurimigebano.pdf
    • http://rudolphalexander.com/uploads/files/52083078663.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_off0000da84.bin
7ec820e7df76b818e1e98dfaec36fa6f9dd162c70709b138958b2890b418e461		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA84 4776 bytes

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