Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dbf45abba02aea5…

MALICIOUS

PDF

66.4 KB Created: 2020-11-20 14:33:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bebcd349e2174432a3eb7bff432ab617 SHA-1: e2ef69df3d55f438d6cdba328c8eb62b91528285 SHA-256: 3dbf45abba02aea5e7ab817565a3f7ff2b7de6a5fac69643e5d9a7ba5dd1de5b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffine.ru', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the idea that the embedded URL is central to the document's malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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=wisconsin+natural+resources+board+members PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485711/normal_5fb5e5f4076d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5f9f9ffa63418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5fb778450e029.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6a7af2-150f-415f-90e1-fd518a930580/75384179211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27080159-97d6-4b66-8857-f725b488fbbd/10987088622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40151ac3-bd13-4ebb-8a70-e3d9a7bea97a/sweet_flypaper_of_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/264e2fe8-1b82-4c29-bdfb-6f70841b1815/10298650294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc39a9c-daab-4db0-ab72-a811938163d3/76402232699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85b63f3-00a2-4fde-8f2d-67291bf9eeb3/pulito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a4bca8-82a7-44f9-8be4-181d670e2950/lara_with_a_horse_1.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_off0000c80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80D 5240 bytes
SHA-256: 6ab52d08b18b6cfacc278e96c554924a6079909ec9c671173a8d783f2738c5be
font_01_sfnt_off0000d9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CD 10308 bytes
SHA-256: 6baf3570c08a669b8d432ad0b9fbe962d61aac4371d3237cf27349a2dce73430