Malicious PDF — malware analysis report

Static analysis result for SHA-256 960d45bd5fe1d192…

MALICIOUS

PDF

63.4 KB Created: 2020-12-21 11:55:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a12106ca559f05ff12753ae6541ae56 SHA-1: 14b85b894a65e311123abfa788d691f26ff0e74e SHA-256: 960d45bd5fe1d192d1c6efac4ca6defba6762a875baf3debcd433b62e0986b18
156 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The PDF contains a large number of external links, with one suspicious URL pointing to 'traffine.ru'. Although no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

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://traffine.ru/123?utm_term=eugene+public+library+schedule
    • https://cdn-cms.f-static.net/uploads/4480905/normal_5fafa767ae702.pdf
    • https://cdn-cms.f-static.net/uploads/4485309/normal_5fa78aaa2f1d9.pdf
    • https://static.s123-cdn-static.com/uploads/4388612/normal_5fc8b4dd6afcd.pdf
    • https://cdn-cms.f-static.net/uploads/4489237/normal_5fd337153eb0b.pdf
    • https://cdn-cms.f-static.net/uploads/4410217/normal_5fb2b2ed866e2.pdf
    • https://static.s123-cdn-static.com/uploads/4412568/normal_5fc419370a96a.pdf
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/zoguvo_buwini_ganuxox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/56ce9e99-670e-41c2-9480-af532be2edd8/xebib.pdf
    • https://s3.amazonaws.com/tufujifinobiro/631162538.pdf
    • https://uploads.strikinglycdn.com/files/94cf025f-2731-4e01-841e-8dc1673f04fe/sistema_de_fuerzas_colineales_resolucion_grafica.pdf
    • https://s3.amazonaws.com/falevi/nsf_sbir_grant_example.pdf
    • https://s3.amazonaws.com/najubu/wholesome_meme_template.pdf
    • https://s3.amazonaws.com/xufaxoferugod/openbve_download_windows_7.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_off0000bacf.bin
7e062bc4245457b2f3c4ba836b2215320879b4433347fd8d51c17ef32f165fc3
pdf-font-stream PDF embedded font (sfnt) at offset 0xBACF 5532 bytes
font_01_sfnt_off0000cd9c.bin
61dd32275000eeff030bd7489758b0702cddf4f6e3889ba838a039d44e7f2f93
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9C 10852 bytes