Malicious PDF — malware analysis report

Static analysis result for SHA-256 c035ccf172c9abed…

MALICIOUS

PDF

107.2 KB Created: 2021-03-02 04:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e67b0594943465aa5dd8f15c371bfc5c SHA-1: f646b8c4f401991c40d9176250417bca6cbd84a8 SHA-256: c035ccf172c9abedc9fd458e8615fac5287d20e6413629d8741a88fe36591588
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or phishing campaign. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to direct users to potentially malicious external 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://leonvi.ru/wix?keyword=palo+verde+beetle+flying PDF link annotation
    • https://cdn.sqhk.co/tinolaseja/jjLsa5Z/best_settlement_defense_fallout_4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426550/normal_5fe9cbf58df86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420752/normal_5fdd79482cccc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499300/normal_6029b563533b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454182/normal_602755d318702.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/hffjihc/vejemowojuwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381536/normal_602a0e865e884.pdfIn PDF document text
    • https://kobuzonoge.weebly.com/uploads/1/3/1/4/131452837/5436279.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/aSiejar/61866398527.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473062/normal_6006e2bce4601.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/jjmhbid/ball_smasher_hack_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/cpRcndX/zepasiwedibot.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/Bhfgijg/12892380257.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001698c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1698C 5200 bytes
SHA-256: 9d081313f3d5b604897354bdd3f44d66e0fa4546a8b9bbc212cfd49a7a46eacc
font_01_sfnt_off00017b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B5D 10760 bytes
SHA-256: 652d96de38cd17b03326996684fa0d6bc8addf199084e498fe458d7abc030dc7

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