Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e069aad85e2567…

MALICIOUS

PDF

79.7 KB Created: 2021-04-09 00:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17e732020e2e0f518b632cf37186d6db SHA-1: 1d6950db16317356e00cf4230e6bc91304e221e6 SHA-256: b6e069aad85e2567cd04af59c076be60fa7bcc87afe4453d63dd34e6705d9190
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to domains that appear to be part of a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9575

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.uts.cw/sites/default/files/webform/pugixenarewowu.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/tefofavokalozigukar.pdf
    • https://ambrose.edu/sites/default/files/webform/58588935603.pdf
    • http://pilgrimland.com/sites/default/files/webform/resume-uploads/mikax.pdf
    • https://ambrose.edu/sites/default/files/webform/xixarujopotagateregigo.pdf
    • https://www.termis.org/system/files/webform/nibobuzokojovafizuza.pdf
    • https://www.telluridescience.org/sites/default/files/tstc-applications/30232074114.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/26688185713.pdf
    • https://www.uts.cw/sites/default/files/webform/vogoledifekotukedadawen.pdf
    • http://spotlight-sites.com/sites/default/files/webform/sizewavajifur.pdf
    • https://www.jwico.com/sites/default/files/webform/69174909787.pdf
    • https://www.mainephilanthropy.org/sites/default/files/ziladiweropisikiforab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=peter+pan+pdf+barrie
    • https://campusrec.princeton.edu/system/files/webform/putiwokareviwe.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001323f.bin
66d959ce979b8653ce8dec77c0fde6f2751241cc575d65843f562aeec7a93028		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1323F 4968 bytes

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