Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5b6b320a4deb0f…

MALICIOUS

PDF

67.0 KB Created: 2020-12-17 18:21:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0da79eb7bc046d4d7ae1b51da6af4759 SHA-1: 5df0844dd861261250ca7f80042001e543d5645f SHA-256: 0e5b6b320a4deb0fbbb1fecdf79802efbd648bff175c68100c0c55f1ee3152ff
214 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. The embedded URL points to 'traffmen.ru', which is identified as a malicious redirector. The presence of numerous external PDF links, some benign and some unknown, suggests a link farm or redirection strategy. The ML classifier and ClamAV detection further support the malicious classification.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=pool+closing+kit+contents In PDF document text
    • https://cdn-cms.f-static.net/uploads/4463825/normal_5fa5b191eaf80.pdfIn PDF document text
    • https://niwejeru.weebly.com/uploads/1/3/4/3/134308800/nixitegilamije.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc58ea3084698658e7deaef/t/5fc64b1cf81c9a2a0c79dba1/1606830876250/66105441026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/172fcce1-5dbe-45b7-b300-fdf9173ff264/heat_loss_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a8f2b85-9bcf-40a4-91d1-e451f5b862e5/59503779286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c733a7f2-c188-4736-9db8-d8bafcb87bf9/55860560332.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/free_ndk_android_studio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2498aff8-9de2-43e5-8995-3ebcb1e853fb/brazil_song_free_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/10433862129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/210f3c75-9ad0-44ce-a179-f5d588953ba9/dv_subbarao_harishchandra_mp3_free_d.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5cd39d26ff1194f957f3c/t/5fd042f00c0c9b10ab0299b2/1607484144382/dukulawawilomi.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_off0000c0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F3 4724 bytes
SHA-256: f60bf67d69e09dc0e3aa15d66de9b8c40a60aaeb350cc364e665105e34d78522
font_01_sfnt_off0000d124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD124 13172 bytes
SHA-256: d78a85d357d7a27ce509ab9febcf85b1316dc83fd983a7fdcfafb34682b7516f

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