Malicious PDF — malware analysis report

Static analysis result for SHA-256 77e4d7b180f4812f…

MALICIOUS

PDF

55.7 KB Created: 2021-04-11 11:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35aaeee3dd5b6146cdafacb5fa839156 SHA-1: 20f1e4bade2d68f386d389f62ce6c85da7bf7d7c SHA-256: 77e4d7b180f4812f28f00fde1259682845e08d34e17b77a19bc7506079fa5507
124 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains references to a "Halo 2 product key 2017" and the PDF itself contains numerous external links, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristics indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or the redirection of users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9223

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.dgs-interparts.be/sites/default/files/41094691834.pdf
    • https://www.visitsavannah.com/sites/default/files/webform/mubojezelu.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/sidetarebuw.pdf
    • http://russian-ice-spb.ru/sites/default/files/webform/files/97818084314.pdf
    • https://www.jsif.org/sites/default/files/webform/94808830073.pdf
    • http://seiary.com/sites/default/files/webform/rec/kutovaduro.pdf
    • https://ambrose.edu/sites/default/files/webform/42416127327.pdf
    • https://web.liderpapel.com/sites/default/files/webform/21411595718.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=halo+2+product+key+2017
    • https://www.ice.cam.ac.uk/sites/www.ice.cam.ac.uk/files/webform/46273532178.pdf
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/60395266702.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_off0000ce44.bin
0d98efc3108c5a14554460dd600d1999619eea72c4e5b2c9c50321354a3fe57f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE44 5424 bytes

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