Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cb262d4b3fe34c7…

MALICIOUS

PDF

64.2 KB Created: 2020-11-20 04:21:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 872955bfc59d384e7c415750f92dec59 SHA-1: d4a6dd78904851ab049f0c8734f20588e231c91f SHA-256: 4cb262d4b3fe34c73963891b330969107e5585094d725d58ba3947931e55abf7
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or redirection attack, likely aiming to lead users to malicious content or further stages of infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://traffset.ru/123?utm_term=seminole+county+notice+of+commencement
    • https://sevivuninuk.weebly.com/uploads/1/3/4/4/134459749/21718.pdf
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f87daf863c84.pdf
    • https://vetovevigu.weebly.com/uploads/1/3/4/4/134486276/nukebaxulid_pefomemofuji.pdf
    • https://cdn-cms.f-static.net/uploads/4531523/normal_5fb62d1862d1d.pdf
    • https://cdn-cms.f-static.net/uploads/4401985/normal_5f98f8601df92.pdf
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/gejabuxavak_pafane_gatepa.pdf
    • https://sopopubepomexak.weebly.com/uploads/1/3/4/2/134265445/d40ccf5.pdf
    • https://venepefo.weebly.com/uploads/1/3/4/6/134666716/dcb2b83065087.pdf
    • https://cdn-cms.f-static.net/uploads/4445750/normal_5f9d6131085a0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fufaragebo/28646513293.pdf
    • https://s3.amazonaws.com/jamokaroxoj/carton_packaging_design.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf7f.bin
4240fe95fe85a304aeb02593cc6ee087e2ebb7976ae8d200199de2f8b30904f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7F 4748 bytes
font_01_sfnt_off0000cfa9.bin
c684673131b2003c779de9906ef4c6e496189b7f86d2105d8387afdc18f76a54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA9 10676 bytes

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