Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe1a43958b8463a…

MALICIOUS

PDF

83.8 KB Created: 2020-11-24 10:26:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2896f1ad3af3bd012cd552e069d09904 SHA-1: 18d0fdbd12966da79007e1a4e14a81936d001f18 SHA-256: afe1a43958b8463a6268e3469890a45f7aa57805e9cefa2442f67dcea39531e0
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, with one prominent URL pointing to 'traffking.ru', suggesting a phishing or malware distribution campaign. The presence of PDF-specific heuristics like 'PDF_SEO_LINK_FARM' further supports the attack pattern of using the document to redirect users to potentially harmful external content.

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://traffking.ru/123?utm_term=the+stanley+parable+narrator+script
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5f9d8c2a07ef6.pdf
    • https://cdn-cms.f-static.net/uploads/4461201/normal_5fa186454c2f5.pdf
    • https://fobabugukejapa.weebly.com/uploads/1/3/4/5/134576868/dagopenos.pdf
    • https://sotezunokupew.weebly.com/uploads/1/3/4/6/134654589/ponebumotodomadu.pdf
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/xiroxoxolaga-jeseranelimaw-zudaliwuruxow.pdf
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/xuxejaxujulezotelog.pdf
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f88eccca88f7.pdf
    • https://togimapobeno.weebly.com/uploads/1/3/4/6/134649298/zeresapenexopul-lexemimeniwon-tokafitew-wubonomu.pdf
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5faaa61f832ce.pdf
    • https://nuzixusimupe.weebly.com/uploads/1/3/4/3/134306281/jizerire.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7134ef24-86bc-4640-b958-95bce21dbf46/wugije.pdf
    • https://uploads.strikinglycdn.com/files/9ba198bc-2f8d-4599-b1f7-cf1437f63eb3/ansys_acoustic_tutorial.pdf
    • https://uploads.strikinglycdn.com/files/55c394f0-fe1e-410f-802f-a5ed8c7953ff/21386387819.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_off000109b5.bin
5bf2298091ee3b046750fd4887818f8bee86d4ec8f1c168e000b3e908baa312d
pdf-font-stream PDF embedded font (sfnt) at offset 0x109B5 5212 bytes
font_01_sfnt_off00011b6c.bin
84d7c95b10297c10f239aa72a9f59b65d70c9ffcf43d3bd35beee71c9d4b754d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6C 11448 bytes