Malicious PDF — malware analysis report

Static analysis result for SHA-256 329763d95573f5b0…

MALICIOUS

PDF

74.2 KB Created: 2020-11-16 16:38:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0b251fa2b88549e68f96c469f7743445 SHA-1: d31fb9a4a1186ec88dc756a4570da84bf01bac6c SHA-256: 329763d95573f5b049ef768cdcc06fde47cdf5504397ad1016eaea8fa2e21732
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=english+in+mind+beginner+pdf PDF link annotation
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/9042864.pdfIn PDF document text
    • https://ruvazokof.weebly.com/uploads/1/3/4/0/134040659/duzunom.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/vaxebisapesi/classic_leveling_guide_wow_alliance.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/scope_of_supply.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/lijaluziwipadoremunuf.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/formule_du_taux_d_amortissement_lineaire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8518bf81-0fef-49a3-8f73-a0d74a29009e/how_to_get_rid_of_demon_snake.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/aurora_lighting_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/goporo/rf20_remote_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/pufuzab.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/satowimakukewefulotizi.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/sutuvorogesi.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/95793304880.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_off0000df11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF11 5344 bytes
SHA-256: 86a5d1deb9e36a331e971cff7ba5a99ddac192c2bf0e9a77728657e3a4f995cb
font_01_sfnt_off0000f10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10F 13468 bytes
SHA-256: dd77d5a7ea694f3aa1fb0949950f3355dcb6641cee1ca9481073d382a71f4fe7

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