Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b6b48c489158e0…

MALICIOUS

PDF

79.6 KB Created: 2021-05-18 22:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e2e5b39a4e252c20b660f514dbce112d SHA-1: 3c4ffd25902916d6bc8d12f362fe02a0090dcaac SHA-256: 14b6b48c489158e0a1b8b9e9c576f68bf17c5ed4fcddf3ce3385f4d16c8b7136
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be related to a video game, likely a lure to encourage users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=how+to+drift+in+forza+horizon+4+with+controller PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367297/normal_5ff227e8b7773.pdfIn PDF document text
    • https://sivipamekan.weebly.com/uploads/1/3/2/6/132682587/moxetiv-bijom-pedobuvife-nokiboxujusib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5fe9c934cccd0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392210/normal_5fe58d198ca68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450724/normal_5fd9d35e532d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445114/normal_5fd2dd553955a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451736/normal_60668117259f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478422/normal_605671c863bb0.pdfIn PDF document text
    • https://tajifajedu.weebly.com/uploads/1/3/1/6/131637014/63b0433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424011/normal_60413dbee0711.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/9599e6c1-2e29-4232-9d73-99ccac7d5692/bowiliximuxage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d6803d5-698c-43e8-9076-de5de3eb7aca/simutug.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/jumifumimuguzeb.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/nujirujagavejejejusupaf.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_off0000f507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF507 5124 bytes
SHA-256: af9947ee661b2eb09735a9cc6f9bcf768421d6b979799b898985f8ee818bee27
font_01_sfnt_off00010689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10689 12976 bytes
SHA-256: 6d71968aeb177a485ebdd847512324faa53373d523a883f2b2dc4ede738bf3fe

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