Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d4fd30e6454ea9…

MALICIOUS

PDF

67.2 KB Created: 2021-05-21 22:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f60ce25497b1ac87b0780a068ea918a SHA-1: 30cf18d30bf1573fdccc9493266c04af1816642c SHA-256: b2d4fd30e6454ea93dfa744003f652da3436736bb92ea84102937f2359c0dcdc
154 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites and appear to be part of a link farm. The document body, though heavily obfuscated, suggests a lure related to 'snake io hack mod apk'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9714

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://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/145c349ab55506a98301964913f40301/71937005052.pdf
    • http://aarogyamedico.com/userfiles/file/10741943808.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c34ddef7c3---nodixipopimumigavodof.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d189c14e77---dipawo.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba51caffa7---58691596732.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085251621da8---90870779087.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7315bb2e4---kimuxarivewakusunudiw.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbf9984e5c---titebeza.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aed390fb4b---87732576380.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/6d8f3b8ecd262fbc2822405afb0d5aae/pefok.pdf
    • http://www.asslar.de/downloads/1005206124.pdf
    • http://voxel-avocats.fr/uploads/file/74232101707.pdf
    • http://iaestedresden.de/userfiles/file/vuxovuxukalu.pdf
    • https://twr1115.net/files/fckeditor/file/sekiramazufumosavelep.pdf
    • http://stlnsk.ru/uploads/file/66507354115.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c459b88ae7---lutivevosudevibusejozadi.pdf
    • https://luyenthitoeic.info/userfiles/file/88447181551.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=snake+io+hack+mod+apk
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e915.bin
08d2dcecad50e682bb13460392e38681c7849cc9782f0547129288e48f5b2b08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE915 5172 bytes

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