Malicious PDF — malware analysis report

Static analysis result for SHA-256 b962114e4ad85cf7…

MALICIOUS

PDF

74.2 KB Created: 2020-12-17 17:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6044f1dd01e6de8c0845127e66ede48 SHA-1: ecb41b58b431e413549536c7c6884a6363cca4fb SHA-256: b962114e4ad85cf75d165c94e33c6f4c76b564cb3218cad1018d42bde30d216b
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. It contains numerous external links, with one pointing to 'traffine.ru', suggesting a phishing or malicious redirection scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/strik?utm_term=estructura+subyacente+de+los+modelos+de+comporta+comportamiento
    • https://refaxezadale.weebly.com/uploads/1/3/4/3/134325555/9480976.pdf
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/1854066.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a9ce1cc6-959a-4a3b-92ed-a0dbc0cfea7a/50431790808.pdf
    • https://uploads.strikinglycdn.com/files/656b04c0-d3c7-4533-9b3f-6920de9019ba/68709180044.pdf
    • https://uploads.strikinglycdn.com/files/1525e2d3-c03b-4fa0-84c4-efce5b5a6dc1/zeweje.pdf
    • https://uploads.strikinglycdn.com/files/1971e6aa-df5d-4f2a-9841-1b1c2bb48a5f/vefusejojuwaxidode.pdf
    • https://uploads.strikinglycdn.com/files/d8561145-1066-4348-8262-e9b25d52a8c3/47640599538.pdf
    • https://uploads.strikinglycdn.com/files/6033d8c4-eb06-42b3-9c27-994669b60f8f/lapojutuvulovutaver.pdf
    • https://uploads.strikinglycdn.com/files/f653c719-d328-467c-96f4-2583630fe20e/math_4_today_4th_grade.pdf
    • https://uploads.strikinglycdn.com/files/1abfb50e-892c-41e0-b461-43532749ad96/dojobop.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_off0000e458.bin
85e106248cc2452c8616ebf3b222572b507efe2849c707affed395a0ddfa6386
pdf-font-stream PDF embedded font (sfnt) at offset 0xE458 5420 bytes
font_01_sfnt_off0000f6b2.bin
f9155e508b2776e3348330891f56b9f4ef3c5ad42e2640f0ecc10bd4bd8fb1f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B2 10904 bytes