Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fab27fadd5d9602…

MALICIOUS

PDF

62.5 KB Created: 2021-04-13 07:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7212f29b048745cf82a5b8fe120fe316 SHA-1: 42a92033c8b662125b1a2a797a48b63b7df5e089 SHA-256: 5fab27fadd5d960294bb3e963999016d1868d6ee6b7c52dd97fcf44b4cf13e78
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of 'utm_term' parameters in some URLs suggests tracking or redirection, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8465

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.mothercare.ro/sites/default/files/webform/resumes/xigidaz.pdf
    • http://russian-ice-spb.ru/sites/default/files/webform/files/fapulewamekunasu.pdf
    • https://www.uts.cw/sites/default/files/webform/tidenopuzi.pdf
    • http://www.birdlifebotswana.org.bw/sites/default/files/webform/sightings-sketches/fipeforivu.pdf
    • http://www.pbttphtk.gov.my/sites/default/files/webform/42283273604.pdf
    • https://www.dgs-interparts.be/sites/default/files/41094691834.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/28911573484.pdf
    • https://ambrose.edu/sites/default/files/webform/20598750849.pdf
    • https://www.mothercare.ro/sites/default/files/webform/resumes/42535902170.pdf
    • https://www.uts.cw/sites/default/files/webform/suvexaxobufakup.pdf
    • https://www.jsif.org/sites/default/files/webform/95147346690.pdf
    • https://natsihwa.org.au/sites/default/files/webform/46250275999.pdf
    • https://www.jts.org.jo/sites/default/files/webform/86196288468.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=miguel+bose+discografia+mega
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/pitoripizebareko.pdf
    • https://lib.asu.edu/system/files/webform/vabomabexajamoja.pdf
    • https://community.princeton.edu/system/files/webform/fivedexexefo.pdf
    • https://www.vub.be/sites/vub/files/webform/16824703900.pdf
    • https://printandmail.princeton.edu/system/files/webform/zupedofijemurak.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc26.bin
c3db5510537efb770cdbc135a8eb1f80586c9e8facf1492eeaf290a8ebbe836f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC26 5488 bytes

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