Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dbd79315f508f8c…

MALICIOUS

PDF

68.6 KB Created: 2020-12-15 04:24:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b06fc844d621ed9c299bdd10a67c2ca8 SHA-1: 97a176a459de53779e5b7eaa655f606739e8a406 SHA-256: 2dbd79315f508f8c78b2f7b8b7c355afb5980f360988b6231ce7c22da7ab5486
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://trafffe.ru/strik?utm_term=kiss+anime+apk+2.2 PDF link annotation
    • https://xirejefeju.weebly.com/uploads/1/3/4/7/134723985/6355538.pdfIn PDF document text
    • https://sazomazijuxo.weebly.com/uploads/1/3/4/5/134522077/bf1fcb287d265.pdfIn PDF document text
    • https://naguxamo.weebly.com/uploads/1/3/4/6/134655503/366704.pdfIn PDF document text
    • https://tizupokewa.weebly.com/uploads/1/3/4/0/134013062/nozef-nuvemefagupumoj-dukag.pdfIn PDF document text
    • https://ganevofetenigul.weebly.com/uploads/1/3/4/8/134893119/4026461.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/5fc14bb05687f52b6b83d941/t/5fc95f3c34a7c95099ece346/1607032639811/musicas_romanticas_internacionais_anos_80_90_e_2000.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/kamolegam.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/digofetaraxorimebumaf.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/tamasha_hd_movie_filmywap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62f6b1fc-7891-4b72-bd95-1ae76a57e714/18169233603.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceedf01d0df60ade607724/t/5fd6f154ffab5d3c560f14e0/1607922009044/14589066366.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/bisexibam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59988c1b-fdcd-406c-9b7e-7d86699cc849/el_papiro_de_ahmes.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/cadenas_de_abastecimiento_dinmicas.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_off0000ce27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE27 5032 bytes
SHA-256: 67a85990e206b940fafea188a666fee6f8051c42800e5e301e2d35cf98a34fbb
font_01_sfnt_off0000df42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF42 11404 bytes
SHA-256: 35c6b068d2bba73533fe0d209a3a55feb0af6e60d18589d3952ff302319ecf0e

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