Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6944b6ca8a0434…

MALICIOUS

PDF

67.9 KB Created: 2020-12-15 22:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3e409aec893f79011d06d72f341091ba SHA-1: 9aa217b519a6aba31b658c08de4b125fc4cebdd4 SHA-256: 7d6944b6ca8a0434896467d983a0a2060b1cbc4992223ece715aa92591844cd5
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical finding for a 'PDF_SEO_LINK_FARM' which indicates a mass of external links. One of these links, 'https://traffset.ru/123?utm_term=o+chem+govoryat+muzhchiny+2', is identified as a potential phishing or malicious URL. The presence of embedded links and the overall structure suggest an attempt to redirect users to harmful content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=o+chem+govoryat+muzhchiny+2 PDF link annotation
    • https://dokakuzod.weebly.com/uploads/1/3/4/8/134884054/fowewul_pidoxato_daxotonevubeku_sirinoxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/varoximu/toniwililowoxafebozos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d566678f-6aaa-44fd-90e5-29a8746662e0/sopalofizaji.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/12798830940.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/block_city_wars_cheat_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2ac8f7-3c4b-40dc-b5a3-d0739e4bb99e/26133776549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/758d13b5-df44-4d82-96f2-0e38add459e1/14455556777.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/jutowu.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/xulepenejevufol.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/blueprint_template_flask.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BD 5376 bytes
SHA-256: 2737008c634480506d7eb116f36a5c4a9df8e851f8402ebf1dc4d2ae0e85084e
font_01_sfnt_off0000d3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F0 14876 bytes
SHA-256: 749eedd4a7b9257a2c9976d468df921e9c02c84571e8e426af1f434cc1618132