Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ff2116ccb8c97e…

MALICIOUS

PDF

63.5 KB Created: 2020-11-10 21:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 479db5f56c131d7c78dcbe5ac47f9965 SHA-1: 80bc466bcaab548fc140fbc303b0d486fdb69bf5 SHA-256: 22ff2116ccb8c97e2d87ab63431fb4f707afff774d6533c2794470b6337fc210
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common tactic for phishing or distributing malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, with one pointing to 'https://trafftec.ru/123?keyword=total+gym+pro+exercise+manual+download', suggesting a lure for users searching for specific content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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://trafftec.ru/123?keyword=total+gym+pro+exercise+manual+download PDF link annotation
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/pugimus.pdfIn PDF document text
    • https://pawuxadatunu.weebly.com/uploads/1/3/4/2/134266652/tesomuvewavuvez-garogedopirag-vukitubuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f876ff4a9467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5f9acf778dc26.pdfIn PDF document text
    • https://tebixuku.weebly.com/uploads/1/3/4/5/134595315/kadazazodavuj.pdfIn PDF document text
    • https://jokepalebaja.weebly.com/uploads/1/3/4/3/134360350/pesipotut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e376b4-8463-4dd6-8994-08b486976daa/roxoriwixupukiruriwefi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/jopofiwazalagumezujusure.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/53257351141.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/gerutave.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/diego_sanchez_ufc_age.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_off0000bae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE5 5604 bytes
SHA-256: 93ee88015d2d6b283980a80dbd9f74b47abfa4cee81f164bd9d27ffd763bfecc
font_01_sfnt_off0000cdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFB 10304 bytes
SHA-256: 830ac81c39d7530680082310f83931028408ff614ec142c5733a39ea5322b991

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