Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72887517c007273…

MALICIOUS

PDF

71.2 KB Created: 2021-04-08 07:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b788064a86980cadace3ef1a5d23e5a SHA-1: bd7737733fad21ee8cd0a74586a730db2e7dcb20 SHA-256: e72887517c007273176850c22121f0a3cfb218cc316352f50bd0eac3847cb83b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'https://botokaw.ru/wix?keyword=comitatus+in+beowulf+quizlet', which is likely a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=comitatus+in+beowulf+quizlet
    • http://kozidozilujivox.getenjoyment.net/sentry_safe_x055_reset_code.pdf
    • http://fakexexu.sportsontheweb.net/wiledujategizowiseru.pdf
    • http://jabofedu.sportsontheweb.net/car_accident_checklist.pdf
    • http://xipodijajul.sportsontheweb.net/fenarujinitewivogaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1dd4ee1a-f50e-4572-971a-9516f5e54bba/baptism_of_fire_in_a_sentence.pdf
    • https://uploads.strikinglycdn.com/files/346204ed-b9e7-4871-8bca-bcc2aa7f961e/lagulomoxatejonumuvege.pdf
    • https://s3.amazonaws.com/bidivo/sisad.pdf
    • https://5f384421-c3d0-4b4c-85a6-d3745974446f.filesusr.com/ugd/40006b_db0d1146bd5640bdb10309aafe4bab08.pdf?index=true
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_2494e9fc9c3946cc96153d27b30a8cd7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/196bc667-0585-4b6c-8553-4f6744cf5e55/kuvozizoxi.pdf
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_203acacc856c4ed287f5c0ea6804dbd9.pdf?index=true
    • https://d650f791-4ca6-4964-96f1-ba9fac0414c1.filesusr.com/ugd/adf9cb_79e895557b4c4d408618452691c6e39d.pdf?index=true
    • https://1350f94c-8d6f-42b4-8351-24983ad6a49a.filesusr.com/ugd/4aae87_e677821725314faab45640e6c7ace6a9.pdf?index=true
    • http://sajatuvireguta.atwebpages.com/alcanos_unam.pdf
    • https://uploads.strikinglycdn.com/files/3ecf2a78-5a3c-43f8-b576-e4883aa225fd/lutowukozanobere.pdf
    • http://lajovaputap.myartsonline.com/nouve_biotin_bula.pdf
    • https://s3.amazonaws.com/vukumesoj/liropelamegug.pdf
    • http://gudukiderunusu.myartsonline.com/63405124906.pdf
    • https://cf0d0a92-5201-445c-b3bf-06a924cdb482.filesusr.com/ugd/3254bf_067ff462ace84c048713bfc540462054.pdf?index=true
    • http://rojanesifilagu.myartsonline.com/milwaukee_bucks_schedule.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbb0.bin
9c73f54376221a6869d13d70a2d9156297593f74b367b2d7211ce71b68782e08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB0 3916 bytes
font_01_sfnt_off0000d987.bin
8f38a9aa9222d569d62918f684f7a7cc5354301c3bb931348e7871716551c88b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD987 5132 bytes
font_02_sfnt_off0000eb06.bin
11121e8419b63bca6a26663e42b6da674c896ae31a150bd07feb5b8f6927a7f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 10328 bytes

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