Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd8f5f23e1a59b2…

MALICIOUS

PDF

77.9 KB Created: 2021-02-21 20:12:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6ffdf33216eb27c561ea8e1783d0e242 SHA-1: 35b730f1bb3c9d2f72d058868fdb9ac04d2e5d9c SHA-256: bbd8f5f23e1a59b27e63f14e9df34e2d126a0c84bf3b13d88b119a12c7002525
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though partially corrupted, suggests a lure related to musical sheet music, which is a common tactic for phishing or malware distribution.

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/aws?utm_term=glenn+miller+in+the+mood+clarinet+sheet+music PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466367/normal_5ffed407de8f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472481/normal_5ffa2bee3e161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491688/normal_602617d1164d5.pdfIn PDF document text
    • http://foodguideblog.com/reported_speech_say_and_tell_ppttzcme.pdfIn PDF document text
    • http://paxivevazuf.iblogger.org/25358528604.pdfIn PDF document text
    • http://ditilage.22web.org/vebinibesu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413374/normal_5fcd6eb2691ea.pdfIn PDF document text
    • http://yazansoft.com/kafufuxirkk24c.pdfIn PDF document text
    • https://cdn.sqhk.co/xovenekot/gjzib1y/vexonob.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/cfsMVig/fazuminagabibenaf.pdfIn PDF document text
    • http://ledy66.net/48201862831lz99m.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/pifOjem/13938669439.pdfIn PDF document text
    • https://cdn.sqhk.co/remudejifi/6bibjeD/91241457746.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381101/normal_5ffe7e0672088.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/meludav/17303219596.pdfIn PDF document text
    • http://sezeludijufoma.epizy.com/40384517360.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/68102664935.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/pancreas_exocrino.pdfIn PDF document text
    • http://nowivopikuzud.epizy.com/guide_etablissements_accueil_petite_enfance.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD775 5212 bytes
SHA-256: 9363e469cf3bb09235c5683e58fb8acdd478738ee1c45eb070048b3ed0d1e26a
font_01_sfnt_off0000e8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FA 13040 bytes
SHA-256: 8313a20cb4acdb2e2d012ccd4e5788ecc69e5d3cfddfb2e3b02654bd0b6972fa
font_02_sfnt_off0001129e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129E 16120 bytes
SHA-256: fb7b45e24c28c4473d0ca1c6410c593992d9a809009f9c41b5ae32c9142507dd

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