Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9b3e443db3d365…

MALICIOUS

PDF

79.6 KB Created: 2020-11-17 14:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: dbe6763dfd7ca54a16ed1fd6e85e56db SHA-1: 9d4e8b25102cbecc1a69f0b9b4e64cdb7ec97b89 SHA-256: 0d9b3e443db3d3650361d5509afb26791595924356bcebe19aa372d58287226c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffset.ru/strik?utm_term=how+to+pick+pockets+for+fun+and+prof PDF link annotation
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/18d06553c225074.pdfIn PDF document text
    • https://kezaguwubov.weebly.com/uploads/1/3/4/6/134632481/rabibitezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403264/normal_5f92a11d09df6.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/efb1a7.pdfIn PDF document text
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/tumafegoripogu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470224/normal_5fad63bcd3e6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384819/normal_5f94cdfde1b9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f9522e46f8ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f9c5e590a92b.pdfIn PDF document text
    • https://wofenexezut.weebly.com/uploads/1/3/4/3/134310974/lanagafajamilusuvu.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/vuxalirudidel/1912507865.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/49557937601.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/nevulijode.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/structure_of_the_constitution_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/employment_contract_agreement_format.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3E 5232 bytes
SHA-256: c5f35130512be0c5289197affa91bd6478a03b509d4d685e2f1e552208bb524a
font_01_sfnt_off00010c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C31 11264 bytes
SHA-256: ed7cbbb38128a3025ce68006684b8899b0b3fdc7c9efdcaf65b86d91db9df469

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