Malicious PDF — malware analysis report

Static analysis result for SHA-256 0345471f199eb462…

MALICIOUS

PDF

86.5 KB Created: 2020-11-19 04:19:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e904ab6626db6237d79b7e1899467b30 SHA-1: d4d81b49e956244eeda74c3a8d962464ba8f92ee SHA-256: 0345471f199eb46235305c7800523e0b8ac10e94d24efe10e139610fc2c47b1e
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm. It contains numerous external URLs, with one prominent URL pointing to 'traffset.ru/strik', suggesting a phishing or redirection attempt. The PDF structure and embedded links are consistent with techniques used to distribute malware or lead users to malicious sites.

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=blue+is+the+warmest+colour+movie+download+tamilrockers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5fa85cf4dc68b.pdfIn PDF document text
    • https://morurotefat.weebly.com/uploads/1/3/4/3/134317018/93e5137.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/zediv.pdfIn PDF document text
    • https://mipumitazolepi.weebly.com/uploads/1/3/4/4/134495795/zesizekileros.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/d1c76cec-a819-4875-8b7c-78c2129dfc03/zeramur.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/candace_parker_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/cargo_bridge_2_game_full_screen.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/pikutigedojufakix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fb30f65-648c-4db8-908b-a9439d8b643e/yahoo_password_reset_code.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/scholar_guide_ff14.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/shark_tank_keto_pills_price.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/tuxef.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_off0001145d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145D 5444 bytes
SHA-256: 6c109d8b2e03e691d188d1c6f03eaa0c5a523410fa51759cd1f85f4cf5c6d829
font_01_sfnt_off000126cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126CB 11412 bytes
SHA-256: 687ac03c7c0db0482693d1f0e8d1116432c6807789bd55ee85485b88b90632bc

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