Malicious PDF — malware analysis report

Static analysis result for SHA-256 8410ccfe3ccaab2f…

MALICIOUS

PDF

217.7 KB Created: 2021-06-18 07:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d8e93983e4495fae0f5d35cbaeb0a529 SHA-1: 696d7be42fa8af3bb74888e1ce93018b78c4169f SHA-256: 8410ccfe3ccaab2f98f10942546835121d8952618b4e410802c204f264e12cf9
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting it's part of a phishing campaign or malware distribution effort. The PDF itself appears to be malformed or obfuscated, with no readable document body content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • 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://jnnycc.org/userfiles/file/gawevotime.pdf In PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160930607980e3---76127019002.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/b78e81d46b2959070b96c6639dad7125/40766957154.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/tp0od2d6ba9kh11i4u55jej3r1/94241318993.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/5524b66b9b47202ac5b59a6d18fe11bc/60128953806.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075706c1778a---paxekaluvewowoga.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9e4c6c3f0---wunosalu.pdfIn PDF document text
    • http://isgsrl.it/images/file/37217085635.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/5450647e234c7506938f9d5e89cf8685/ganuravifove.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/2448091610.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/neloge.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/effa7de4048ea9740de801ef37fe963c/xorubo.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/69453480416.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/ar3drqhhgaiusvovagl48u5kn0/64314947646.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/9007808814.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/migexafesabo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=switchgear+and+protection+handwritten+notes+pdfPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00031d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D9E 5580 bytes
SHA-256: 5ea4a05328c928723618d40131d9aec25a9509ba781e3f3899a593d09fd3932f
font_01_sfnt_off000330aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x330AA 11164 bytes
SHA-256: 5fd727d9e7fd6f3ce8e81684d821de20262dc429e0b9ca2e4ab1b07085abbdb5

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