Malicious PDF — malware analysis report

Static analysis result for SHA-256 b16519d6021d8213…

MALICIOUS

PDF

55.8 KB Created: 2021-05-12 00:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f286241f08790e759745748c6675a2c6 SHA-1: 96682e4164c1bd4b586a5b654304f0e54bc26344 SHA-256: b16519d6021d8213773a4468feea8a7e78d4bd627c5b924785cb4f7c21c84674
154 Risk Score

Malware Insights

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

The PDF document contains numerous links to compromised WordPress sites, suggesting a link farm used for distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8244

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://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/97e93c3707cf7e572054ec67a63c8b38/papiwobuso.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160725a4a87fcf---8646496075.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/jblv3revopcs6bsqmsvbmdjcjv/vemas.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/21f4ed52775cb817c1feb545d0facaac/dirapitumidanoz.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/34b5f34aa5035f28fa8817f1770cc7ea/deduxi.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751e67d1bd5---mokekisusepirevizunorize.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/1f24cffb2f232829b869f6a409269ec1/69347184073.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/52439759a718c7f5bd8279858bf929ff/sosigaz.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/fcb4bbf672a2e5cccc49a63729b825c9/14304284557.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083349c8de1c---14947732802.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16089f0e6eeb9a---dunonopijozegebuwipabum.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/lq857r5arv2qqg4jr87tbfmdt9/32212836172.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/403abb46225bb8ec39b532bbc32356e1/96042181294.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=astrology+answers+membership
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf34.bin
9bae14a9b3c0092452ea7e372cd991c549f578d98a3fe81e7e5ba422b9d3d76d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF34 5556 bytes

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