Malicious PDF — malware analysis report

Static analysis result for SHA-256 057c6e9721e8ad53…

MALICIOUS

PDF

79.5 KB Created: 2021-04-07 05:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e32a845888da7ddbce08f124d93dac02 SHA-1: 411c3602a7afb91307e97b5d983a3619f6a00356 SHA-256: 057c6e9721e8ad53ef2b93d18311c5ad946da86c1bfa207381a4f1772ade0085
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and a heuristic firing for a link farm, indicating an attempt to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8867

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://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/tojawi.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/604022749.pdf
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/zavemazawutojene.pdf
    • https://www.pharoxglobal.com/sites/default/files/webform/7322176875.pdf
    • http://www.birdlifebotswana.org.bw/sites/default/files/webform/sightings-sketches/fipeforivu.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/25507329945.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/subeditanutojodojewogize.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=telecharger+je+me+d%25C3%25A9brouille+en+anglais+pdf
    • https://campusrec.princeton.edu/system/files/webform/febapaxugodikuzakepob.pdf
    • https://community.princeton.edu/system/files/webform/jidubiziro.pdf
    • https://thesanfordschool.asu.edu/sites/default/files/webform/99818817157.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e8e.bin
cd50a9bbadaa146b463d9b4c60e383fddde91d5286d02f88d55d6ee128997677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8E 5876 bytes

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