Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d65db812b61ef2…

MALICIOUS

PDF

63.3 KB Created: 2020-11-30 18:11:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9685ba20e37ea2cce5947694ca7dc4c7 SHA-1: 9d4c66d1b916b435267029c12d4cd5e17df7715b SHA-256: c8d65db812b61ef28b40e8186725a13dc603ec152c4bc02bd8952e5c24752500
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent link pointing to 'trafffe.ru/aws', suggesting a phishing or scam campaign. The PDF structure also indicates it's part of a link farm, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/aws?utm_term=adverbs+sheet+year+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5f906e6712fd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401985/normal_5f97a63c9b13f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5fb4f947437b9.pdfIn PDF document text
    • https://jaduxopedarev.weebly.com/uploads/1/3/4/7/134749363/tuzevidukuxitawez.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/najubu/16163367591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c456ee29-0ff4-4bc2-b16a-b1ec4f97dd2d/driverpack_solution_offline_highly_c.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d67b8ef7301f8b106140/t/5fc309b4f81c9a2a0c0660a7/1606617524791/8777893785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1561c7ba-3047-4fc5-9fb8-bea493a34468/13153495222.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd131452f90b7fe52ecb/t/5fc336f9cb3e0f5771b8d338/1606629113411/xapejanufogupewarova.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2fc6c23b2b0938fbd7ef/1606234069654/interpret_division_with_fractions_lesson_8.5.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf492afa04221c7116684d/1606371627449/bojobuzaxopawonug.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_off0000bae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE1 5336 bytes
SHA-256: 3490faca4bb188cd44427f3b1142aff6088ca8f4717342e7ae158013d909dc16
font_01_sfnt_off0000cd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0E 10468 bytes
SHA-256: 09fb84a98b69df97f6cec614d9c16f22a3fa48b7814e4c1b4eb8613151efb0c6

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