Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abada4029e1f5c6…

MALICIOUS

PDF

66.2 KB Created: 2020-12-21 18:44:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b5b85a95972cbae79e121901edc6c42 SHA-1: 01df1b7ad886bd6ff7ce2f9bf8be2ee4ab4c4efd SHA-256: 6abada4029e1f5c67f3d579aead98649f513f4590e3216221b2377bb3fc0bda2
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to a sports game, aiming to drive traffic to malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/strik?utm_term=islanders+vs+lightning+game
    • https://tijukubi.weebly.com/uploads/1/3/4/4/134458902/gorakojajabolivor.pdf
    • https://nifufoji.weebly.com/uploads/1/3/4/4/134458522/b03ff0d0bb1d83.pdf
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/kunigu.pdf
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f87816c28ef3.pdf
    • https://cdn-cms.f-static.net/uploads/4417206/normal_5fba76610215e.pdf
    • https://cdn-cms.f-static.net/uploads/4383807/normal_5f96765e379b0.pdf
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/1657172.pdf
    • https://cdn-cms.f-static.net/uploads/4461767/normal_5fadb98888278.pdf
    • https://cdn-cms.f-static.net/uploads/4381291/normal_5f96b90c1f0a3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zufaxepixiguxax/colt_m4_full_metal_airsoft_gun.pdf
    • https://s3.amazonaws.com/zeworibuzoza/92460276639.pdf
    • https://s3.amazonaws.com/guwutivupudutu/todudesekewiwasa.pdf
    • https://s3.amazonaws.com/pibajuwi/students_or_student_s_grammar.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_off0000c887.bin
e628575dc6e6483ae291c49a5845a05b6fbad66ad597b23a9b6dd17ea2b2d2a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xC887 5236 bytes
font_01_sfnt_off0000da33.bin
58acb3d339827f8b35514061d85897f41b9abf9e9dc57bb1983bcce990148e14
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA33 9844 bytes