Malicious PDF — malware analysis report

Static analysis result for SHA-256 2769ad4feb178674…

MALICIOUS

PDF

79.3 KB Created: 2021-04-20 02:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e669b4f32a0be4ba75ef12e27f51ea3 SHA-1: e8dd92646a32d36bc0ed82720614619acd50c5c9 SHA-256: 2769ad4feb1786741383dd76c34d027747519e4aa2b9870545264d1d94041ea4
124 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is likely used to redirect users to malicious websites, potentially for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8157

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 http://www.friendlycc.com/sites/default/files/webform/tojatovovezugunubi.pdf
    • https://www.dgs-interparts.be/sites/default/files/36138637258.pdf
    • http://portal-mysigma.com/system/files/student-proof/41429692510.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/10654010608.pdf
    • https://www.mothercare.ro/sites/default/files/webform/resumes/tawapiseligimagawawujimo.pdf
    • https://www.dgs-interparts.be/sites/default/files/xufatonapa.pdf
    • https://www.uts.cw/sites/default/files/webform/nufideleze.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/dutaberapowuniz.pdf
    • https://www.blplegal.com/sites/default/files/webform/89971565628.pdf
    • http://www.guninetwork.org/system/files/webform/heirri_proposals/32710798707.pdf
    • https://aboss.by/sites/default/files/webform/zivexovoburowunaxomenip.pdf
    • https://ambrose.edu/sites/default/files/webform/ginigiwosumomigari.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/86038084563.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=mouse+guard+rpg+pdf
    • https://www.healthdata.org/sites/default/files/resumes/fanonexujezurexuli.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117ff.bin
3dc08aa85a8445a429db62f2967156fbf761b1922bc8828a93312f09bbbd8cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117FF 5180 bytes

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