Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9bd20db2f7022d8…

MALICIOUS

PDF

83.8 KB Created: 2021-03-24 02:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 313c1ada5608f9640a7021553ec8de98 SHA-1: 49bc5e8d9c2f646d894cc548dc23c2f52ea7c87b SHA-256: b9bd20db2f7022d837b854381629c5351996e5b7fca120a63efcb2ef29c19719
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. ML classifiers and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The presence of an external URI and the overall classification strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=world+of+darkness+fighting+styles PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4506063/normal_5fcb4a0c79f34.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/48390843540.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530937/normal_5fcd8f6bd21e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444102/normal_5ffea5b5e142e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388157/normal_60242631828f0.pdfIn PDF document text
    • http://mopowataxix.medianewsonline.com/planning_programming_budgeting_system.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464700/normal_604692a312727.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mukutud/ninedikilatigobari.pdfIn PDF document text
    • http://wozimape.onlinewebshop.net/guardaroba_capsula.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/54558473929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd5bdf1b-1b46-4181-aa00-ca06fca71e64/89185117817.pdfIn PDF document text
    • http://wobanunep.myartsonline.com/wobupedifenirodiwojogowu.pdfIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_87b495b25b4e421aac8ad5aa248e290d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xabalaru/free_business_analyst_resume_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/61976328456.pdfIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_ff5b765b9ddc4c51aac5c56f98bc92d0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/977f225d-f8ad-4089-ba12-2b3680a5de4b/best_fly_fishing_setup_for_trout.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_928161ec63f94202b9d9c40a733be57a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/xebuvojabarulazixo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE797 5136 bytes
SHA-256: a779bb9bead9ce443541c23420a3ebf75b592afeb39c9053d520be78a666ae14
font_01_sfnt_off0000f91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91E 10652 bytes
SHA-256: d5b1c2d818538cdb2051ce833fab0be882922d66e665edc9bfc736f6d89942e5
font_02_sfnt_off00011da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off000132ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132CE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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