Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1bbe72989d3ec0…

MALICIOUS

PDF

75.0 KB Created: 2020-12-25 10:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e283a84c9a3e55f1903db0f24064d44 SHA-1: d0fabdce3cb58fff7c5c423f58072e2d4985117f SHA-256: aa1bbe72989d3ec076e53c21fa98af4a2d22091d16726613dae66694fa653d22
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded links, with one pointing to 'traffnew.ru', suggesting an attempt to redirect users to malicious websites for credential harvesting or further payload delivery. The PDF structure itself is also noted as a link farm on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=worksheet+kitchen+utensils
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/d5b7b00403ec.pdf
    • https://cdn-cms.f-static.net/uploads/4418755/normal_5f9af921c0915.pdf
    • https://zexunipubu.weebly.com/uploads/1/3/4/8/134877105/a5d846d7f0438b.pdf
    • https://rujuzodojavumip.weebly.com/uploads/1/3/4/7/134726220/noziwupiva-bitanunanezerin.pdf
    • https://cdn.sqhk.co/tewisifupib/ijjaijb/osrs_fossil_island_wyvern_slayer_guide.pdf
    • https://nefupoxuwuridek.weebly.com/uploads/1/3/4/7/134747690/fotexa.pdf
    • https://static.s123-cdn-static.com/uploads/4389080/normal_5fc4f039b1089.pdf
    • https://cdn-cms.f-static.net/uploads/4444110/normal_5fd67a497fd71.pdf
    • https://cdn.sqhk.co/baxemazisod/ujbNgec/hokey_pokey_dance.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/880c8a0a-5952-420d-b6e8-09e37fbdb4a5/sublimation_heat_press_settings.pdf
    • https://uploads.strikinglycdn.com/files/1f1f587e-c1f3-4310-a11e-6b2d132dad58/jukuvixej.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_off0000e364.bin
bc783da7f77a38b112678fc80219accc707274b9db7d52b50d241d0437f08496
pdf-font-stream PDF embedded font (sfnt) at offset 0xE364 4756 bytes
font_01_sfnt_off0000f3a1.bin
08bf73519165c10995ed76b43f65f5e396ff9027c0d67b3b2827242ae378e08d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A1 12680 bytes