Malicious PDF — malware analysis report

Static analysis result for SHA-256 211575c102f091c3…

MALICIOUS

PDF

71.2 KB Created: 2020-12-30 20:11:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 418979a9641251b1d41bbc7542830c5d SHA-1: 1d09107bff54d98f0c4aed8261c9a36772d1a361 SHA-256: 211575c102f091c369819f6710d9fdaf06040e7e53ea0b25d851c68a06dc8e55
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://trafffi.ru/123?utm_term=fourth+anniversary+gift
    • https://cdn.sqhk.co/kuvapipitol/jiijfjH/dymo_colorpop_label_maker_canada.pdf
    • https://nofevezim.weebly.com/uploads/1/3/4/7/134770192/zidibi_nosujuku.pdf
    • https://static.s123-cdn-static.com/uploads/4495264/normal_5fdf78b9ef7d4.pdf
    • https://kurasapar.weebly.com/uploads/1/3/4/9/134902571/efa15.pdf
    • https://cdn.sqhk.co/wefekoferu/VZjoLJB/xijinovita.pdf
    • https://static.s123-cdn-static.com/uploads/4367952/normal_5fec0d33a68c7.pdf
    • https://zumizosapozogem.weebly.com/uploads/1/3/2/6/132681504/96ad70b9.pdf
    • https://jaxizunup.weebly.com/uploads/1/3/4/8/134885867/1313232.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cc08c891-ffdb-4da4-96da-502f39d77d12/swtor_class_guides_6.0.pdf
    • https://s3.amazonaws.com/pezofut/consumer_report_best_tires_2018.pdf
    • https://s3.amazonaws.com/jamokaroxoj/13379249923.pdf
    • https://s3.amazonaws.com/votuweroxigezog/40645989450.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_off0000dc1d.bin
4986d66cb6b344ac9dea7d73ad0cef665332d36f509933d03d468ec1e6e2b15d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1D 5116 bytes
font_01_sfnt_off0000ed95.bin
8b9bd1b9a71ad3704d98dbce083ee3780b37b68414044f651396a0d6468487c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xED95 10412 bytes