Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba5739bb0d754f4…

MALICIOUS

PDF

71.5 KB Created: 2020-11-24 10:54:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b5c59b87e2a7f418ce638b64c0ea3812 SHA-1: 6fbcf8f46e94662a8205432d5ca28b3ec733abc8 SHA-256: 7ba5739bb0d754f4797d9a16bfd55d9448dfe79ac1a74244dd72e3a21cc11e0d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains a large number of external links, many of which point to PDF files hosted on various platforms, suggesting a link farm or redirection scheme. The primary malicious URL identified is trafffi.ru, which likely serves as a landing page for further malicious activity. No scripts were extracted, but the PDF structure itself is designed to lead users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/strik?utm_term=silent+protagonist+fallout+4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376619/normal_5fa1dd8845df3.pdfIn PDF document text
    • https://tavafawenu.weebly.com/uploads/1/3/4/3/134395038/wegizobinuru.pdfIn PDF document text
    • https://pirubanulap.weebly.com/uploads/1/3/4/8/134847944/3192987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f9746b6bcb06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/60af1aba-859d-4458-bb0c-3df5d7306e0f/67982741670.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/hernia_umbilical_pediatria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a9e0b8-3b91-46b7-b3f4-0f199c2bfa75/3944216337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c21cfe5-dc80-4dc1-9a77-4101026414ae/79492841081.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/my_ford_benefits_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ec4150-86dc-4302-9cc2-55098b9ddbc3/29_gallon_aquarium_stand_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd4e1054-cf4d-4a80-a81e-1592f145f229/17230459251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b97daf-c64b-4c39-8842-3af20f6d8e91/xiratorajedepoteveji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a79aebfa-dec7-4e38-a97b-745d949307ae/honey_select_flashbangz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b009a78-a2dd-42df-99bf-0a6306f79d61/golixur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225f0ecc-b2d6-45fe-94f5-83aa50167090/myst_3_no_cd_patch.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9B 5140 bytes
SHA-256: 35e327e6be352ed7fcc870bc8abb9d1ca4d84c9b092592c5f8bb3051d88ea342
font_01_sfnt_off0000dc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC22 10952 bytes
SHA-256: 83af6347b4ce0a06d6d73540060bb04c28e0156b6b9aaa3fab37063ca24e3516
font_02_sfnt_off0001018c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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