Malicious PDF — malware analysis report

Static analysis result for SHA-256 3642734342874d14…

MALICIOUS

PDF

61.6 KB Created: 2020-11-30 11:34:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f31b830a66336933fa3e4519a3956159 SHA-1: d6a436b69da9efa1cb79e3ce5af5b75a162bb9bc SHA-256: 3642734342874d145f31ecf97c18e3f248f3ee121f11757a9fa4a258f2b3bedd
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 phishing or trojan payload. It contains an embedded link farm with multiple external URLs, including one pointing to 'trafftec.ru/strik', likely a phishing landing page. The PDF structure and embedded content suggest it's designed to exploit users by directing them to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafftec.ru/strik?utm_term=nist+handbook+135 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403262/normal_5f96a10a4ebaa.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/fd026ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f8b91d63565f.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/5fbce344be7cfc36344e8aaf/t/5fbf5fe93c02f22b9d04fc24/1606377450058/fegolubupomiwugivevul.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c9c111f6a41984851340/t/5fc4aa684e98326c02a52d51/1606724201261/59055115057.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5bafe6d49a06bb894894/1606376368592/zofunapaloretowejazup.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcee2c3ca23154c959f80f/1606217262054/android_sdk_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14b808139af037647f366/t/5fc2af0b3570fb44d15b1f6c/1606594316299/velesozejukinizuk.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/3624021092.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d7ac403f5353fd956fc5/t/5fc167d4fa04221c7154a289/1606510549062/wigijinixosu.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/wedding_background_cdr_file_free.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_off0000b6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A2 5296 bytes
SHA-256: f772e481dd49bdc558f5b337da10a73a576e71ac4e4d518793725812df2ec8ee
font_01_sfnt_off0000c8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8AD 9776 bytes
SHA-256: 421b0482d1cd785b3307cd4273c7c4fb9922570783acba31753cbd0c9b8c7c38

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