Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bcc765ac1ffe4d0…

MALICIOUS

PDF

66.8 KB Created: 2020-11-24 04:31:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94a6d4fc8c32c76c23252cec42d146ed SHA-1: 115d22d55f697ecae5e1cd6a5129d75bb4df7fbd SHA-256: 6bcc765ac1ffe4d09f042b97d6b62579f942c8a19a78ac8624a7046613ec5d6b
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external links, with one prominent link directing to 'traffset.ru' under the guise of a 'birth certificate maker job'. The PDF structure and the presence of embedded links suggest it is designed to redirect users to potentially malicious websites, likely for 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-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://traffset.ru/123?utm_term=birth+certificate+maker+job
    • https://kawijidaxo.weebly.com/uploads/1/3/4/8/134891868/64447f2ef11.pdf
    • https://cdn-cms.f-static.net/uploads/4413566/normal_5f9d06c152f76.pdf
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f88a943f2c06.pdf
    • https://cdn-cms.f-static.net/uploads/4416661/normal_5f9febef88a82.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/971ed734-3138-4a0f-be29-021b7394c1f2/jupuwizunibijevijoxupowi.pdf
    • https://uploads.strikinglycdn.com/files/6d13fd1d-2516-4192-8ebd-87da474bb88b/zasaxowofafide.pdf
    • https://uploads.strikinglycdn.com/files/e106aec7-1010-42dc-929e-68bec8494454/99360238711.pdf
    • https://s3.amazonaws.com/sojuravewi/nefijonalamovovamibo.pdf
    • https://uploads.strikinglycdn.com/files/2bd51dcd-cd4f-4896-9315-5834abb3f024/gacha_life_2_download.pdf
    • https://uploads.strikinglycdn.com/files/9c41c2df-4071-4271-8eed-7867260bf5ea/povefirixug.pdf
    • https://uploads.strikinglycdn.com/files/7d1e485d-0baa-48bb-9bcd-f6202fb523a5/32300369524.pdf
    • https://s3.amazonaws.com/gogoxowiniza/79422704717.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_off0000c9a3.bin
208562d05c26ea03bbb1e1a8319fd97b3f6978dc1228fe1d26248786cacd435c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A3 5240 bytes
font_01_sfnt_off0000db54.bin
17a4b72f0587fd7c5adbe6a0a325d0d7f98064e017be37cc591877f6c8ace7d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB54 10364 bytes