Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fac902b0a026553…

MALICIOUS

PDF

115.6 KB Created: 2020-12-05 18:56:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cacf19d5054f4d70a3eeb0b9e212920f SHA-1: de19d71e4f828ac1edfd7a62c9c562a7d70ee46e SHA-256: 3fac902b0a0265530a70b25b14541c68de65a673530526b5dd207de92290ad86
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are to other PDFs, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The primary external URL, 'https://traffine.ru/aws?utm_term=american+pie+all+parts++allofpc.+in', is suspicious and likely leads to a phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent.

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://traffine.ru/aws?utm_term=american+pie+all+parts++allofpc.+in PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481836/normal_5fc450f3a8ec6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451762/normal_5fa2b8eb1fdcb.pdfIn PDF document text
    • https://jodonorinomudo.weebly.com/uploads/1/3/4/3/134316483/vipiwutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393647/normal_5f8f6243010c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453908/normal_5fb6af25b0ea0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414515/normal_5f94bceb72331.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/tugumeb/risk_management_meeting_agenda_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/wow_toys_collection_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10620bf71053ccb10dd13/t/5fc314ad7acac6192a25d8b8/1606620335524/shaadi_mein_zaroor_aana_torrent.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2af36df132613bbc92a03/t/5fc9a742fedaa13a485e8cef/1607051081341/di_calcium_phosphate_msds.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66c5011f6a41984ab7b42/t/5fcb3fe0da45e86ccaa08ffe/1607155680597/fedametogixukaf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c656affbf90a660350a0/t/5fcb5601393ce4735631ad1c/1607161348779/zowovaxo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0805cd49dd12447321748/t/5fc141343570fb44d130aa52/1606500660401/petes_auto_repair_tucson.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10afc403f5353fd968892/t/5fc12bdd9ee0f32b877d03b1/1606495199058/17993596971.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_off000189ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189EA 5180 bytes
SHA-256: dd026d314977e2a5d8dda80409ccb56c0a1580132848acec820b38873d25461b
font_01_sfnt_off00019b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B75 11100 bytes
SHA-256: d75550ab97f93b0f239f3d4f18e44d44ef2d4325c372cdc830e2d8a6b36906c7

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