Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce041de8827d924c…

MALICIOUS

PDF

69.7 KB Created: 2021-04-13 20:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20baffd928aa481a1b36dc1fb3146ae8 SHA-1: 8d313a3e8474c93ded9f6e13d179369ab1c8975a SHA-256: ce041de8827d924c1c2a595f87cc73b3d7035c6886290851ae49056bdd577530
124 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which are unknown or suspicious. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using multiple domains for link distribution, a common tactic for phishing and malware delivery. While no scripts were explicitly extracted, the presence of PDF_URI and EMBEDDED_URL heuristics suggests the document is designed to redirect users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9545

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.osgeurope.com/sites/osg-corporate.dev/files/webform/zizepuniket.pdf
    • http://www.pacificsportfraservalley.com/sites/default/files/webform/zajufofagobixipisuna.pdf
    • https://ambrose.edu/sites/default/files/webform/74647609277.pdf
    • https://www.natsihwa.org.au/sites/default/files/webform/25680057182.pdf
    • http://seiary.com/sites/default/files/webform/rec/6045441545.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/24974410021.pdf
    • https://www.telluridescience.org/sites/default/files/tstc-applications/90077644064.pdf
    • https://www.a1touchsolution.nl/sites/default/files/64517041799.pdf
    • https://www.dgs-interparts.be/sites/default/files/jinez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=beginner+jazz+piano+book+pdf
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/77241298986.pdf
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/76225898136.pdf
    • https://printandmail.princeton.edu/system/files/webform/31356988355.pdf
    • https://umatter.princeton.edu/system/files/webform/requests/roporopapoviz.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc55.bin
75e8918aee4d349cee876fbbe8db237aaacf8fc3735283d06614d8fb63fa1de0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC55 5380 bytes

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