Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53d662a069af224…

MALICIOUS

PDF

72.6 KB Created: 2021-03-02 21:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d88b614eefb915d5d99853be996eceb6 SHA-1: df120c71e095b9a3bb3a356d48d3f33449c324e7 SHA-256: d53d662a069af2244161d4650ce0ba4308daaa0da8a3a52d4825c378fa374b21
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains, indicating a link farm or SEO spam tactic. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content.

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://dugedepap.ru/strik?utm_term=kawasaki+engine+specs PDF link annotation
    • http://vazaferexadamaf.22web.org/dell_monitor_ax510_manual.pdfIn PDF document text
    • https://kiwosadil.weebly.com/uploads/1/3/5/3/135384828/e850c22c25.pdfIn PDF document text
    • https://voranafirodibug.weebly.com/uploads/1/3/2/6/132696030/4670539.pdfIn PDF document text
    • https://venepefo.weebly.com/uploads/1/3/4/6/134666716/17a0bd5.pdfIn PDF document text
    • https://letazofuwukuge.weebly.com/uploads/1/3/4/8/134869061/50f6ef7872568f1.pdfIn PDF document text
    • https://cdn.sqhk.co/fopeziriga/HnWghjc/46250558089.pdfIn PDF document text
    • https://cdn.sqhk.co/tavedikovo/hcjjTZh/72002520352.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/fexuror/bloodborne_strength_build_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/sugesufevisinir.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/thank_you_for_waiting_for_my_reply_email.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/64135633427.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/liputa.pdfIn PDF document text
    • http://bimivopi.epizy.com/ratawe.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_off0000e011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE011 5096 bytes
SHA-256: 9d1f7eb40a69197e4fa187d9a9f88e40f1c68748e3faab5637af44f9c0942399
font_01_sfnt_off0000f19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19B 10552 bytes
SHA-256: 47c58a3f5985ec4dbd32963486fb569fba5ed4b49370b9c4fe31d15c706aac2a

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