Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96a2e7f521d4d75…

MALICIOUS

PDF

74.6 KB Created: 2020-12-30 15:19:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 443bc7410d9f1ac199bf8beb53adece3 SHA-1: 5acc3fe79b4d104eb7f5313d13a62622d5273b33 SHA-256: d96a2e7f521d4d75ec6da3222cbdca403abeb28caa9dbe97f468a73523987bbe
156 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. One of these links, https://trafftec.ru/123?utm_term=digital+genius+lab+bbb, is flagged as a potential entry point for malicious activity. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/123?utm_term=digital+genius+lab+bbb
    • https://cdn-cms.f-static.net/uploads/4454546/normal_5fd2c687f3ad3.pdf
    • https://cdn-cms.f-static.net/uploads/4391642/normal_5fa93e3e1e473.pdf
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f87289196eb2.pdf
    • https://cdn-cms.f-static.net/uploads/4428043/normal_5fe9363093bc2.pdf
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5fbedd3443213.pdf
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/xekena.pdf
    • https://cdn-cms.f-static.net/uploads/4415754/normal_5f94a01915988.pdf
    • https://cdn.sqhk.co/foxinukepo/Digih9c/57779204211.pdf
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5fad946289f0d.pdf
    • https://cdn.sqhk.co/sozovoja/hjgjigC/dekuwofonulenip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/27f67eaa-1135-4e30-b709-c3027a4fd79d/73522678621.pdf
    • https://uploads.strikinglycdn.com/files/6b717540-a415-45c6-8662-23a09ce957c0/xcaret_map.pdf
    • https://uploads.strikinglycdn.com/files/30969c3b-5324-4bbe-9a63-5bbedb25e354/word_dictation_voice_commands.pdf
    • https://uploads.strikinglycdn.com/files/f67ebe49-7f23-452e-80e0-a54d53a5fd60/94955223733.pdf
    • https://uploads.strikinglycdn.com/files/224b006e-4726-475c-9acb-cea14a5fdf28/social_psychology_textbook_9th_edition.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_off0000e701.bin
2ab599ed516c77a4f2fb22d8d5f28e78cc934d62c23582375cce37ea3a9f713b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE701 4896 bytes
font_01_sfnt_off0000f7c2.bin
c0558e24750523826df4e7b88cf0cccd7bc60543a083b87b6900747a580e41fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C2 11324 bytes