Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25cf2927b51f191…

MALICIOUS

PDF

73.2 KB Created: 2021-02-25 13:32:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b35d5c4ac573ab557fb94f3621989db8 SHA-1: 7856c7af4c7820a63b5ff1503302edfd88cdf3b0 SHA-256: e25cf2927b51f19167ad5756eba2b7aa505de1dd0ed85e71c698d4a790bdb1bf
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely intended to phish or deliver a payload. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/award?keyword=is+the+fender+champion+20+a+tube+amp PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418185/normal_5fdda9a2e1bd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404745/normal_5fcf433093996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428329/normal_60355f9101bc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450514/normal_5fd068761e895.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479718/normal_5fdf02d11015f.pdfIn PDF document text
    • https://cdn.sqhk.co/bibolaned/dhhMQij/pottery_wheel_kit_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/zivudasexoni/d6QvEhj/95756131162.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/3jaqoid/35233500367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483359/normal_601885fb2c76e.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/f3mlhdY/tactical_nav_apk_4._0._3.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenixa/ieFDMij/kirilawe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365551/normal_5ff66fb4affea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405674/normal_5fd1d1efb9d25.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/bipepezuwed/american_truck_simulator_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/compound_nouns_quiz_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/22356491880.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_off0000e15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15D 5716 bytes
SHA-256: 1be0a7ddec25fce9b84683234853e145fcf71e08e20da8b886eefe1fd68fd003
font_01_sfnt_off0000f49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 10184 bytes
SHA-256: fa411cb10d911308c1109688148bcf80caa59054d8589e043ed6ee01abfef2e7

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