Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a6f806961d22ba…

MALICIOUS

PDF

62.3 KB Created: 2021-04-24 15:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e40ac43fa3f743b66211b383c5772d7 SHA-1: 2d9ce8fac6413f2218eb8089664a3ba5bff2cb28 SHA-256: 40a6f806961d22baa09f89f233718a88588b5c30b000f18e9c8d808c4c74dbca
124 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body suggests a lure related to an online test, and numerous embedded URLs were found, many pointing to potentially compromised websites or link farms. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7613

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.telluridescience.org/sites/default/files/tstc-applications/kuvusuwube.pdf
    • https://www.a1touchsolution.nl/sites/default/files/rowiduw.pdf
    • https://www.dgs-interparts.be/sites/default/files/jinez.pdf
    • http://spotlight-sites.com/sites/default/files/webform/93789740410.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/39809543560.pdf
    • http://www.muttypawsacademy.com/sites/default/files/webform/vaccines/lozege.pdf
    • http://www.pacificsportfraservalley.com/sites/default/files/webform/banofamuwidobekoke.pdf
    • https://ambrose.edu/sites/default/files/webform/9979090083.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/27880179426.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=first+aid+2017+online+test
    • https://community.princeton.edu/system/files/webform/xakefabobadu.pdf
    • https://community.princeton.edu/system/files/webform/luzixuganigofifabeja.pdf
    • https://drones.princeton.edu/system/files/webform/vijebutipide.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ec.bin
cbbb135c851214256c5b7510b380f20cdbe4cef91e5a153b05ccbaaf6caf9a2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EC 5180 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.