Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ee7731a04192ec…

MALICIOUS

PDF

79.7 KB Created: 2021-03-28 13:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 734dd075ecf1772aeb09b272e9b019c4 SHA-1: 9ba6978ae3fd99d7a52d0a38b95542c118132d32 SHA-256: b2ee7731a04192ec8415ba15c462f3e6579831dca804ebdb1d70f3ed385d4c4a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a biology textbook, aligning with a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/123?utm_term=biology+book+campbell+8th+edition+pdf
    • https://cdn.sqhk.co/lupobikud/gfzsThd/calculator_app_for_windows_10_offline_installer.pdf
    • https://static.s123-cdn-static.com/uploads/4493881/normal_5ff0c7a0c344a.pdf
    • https://cdn.sqhk.co/beratinuga/j1GYjjZ/tilotaxixa.pdf
    • https://sebidodeg.weebly.com/uploads/1/3/4/4/134438526/lomunazogoz.pdf
    • https://static.s123-cdn-static.com/uploads/4467017/normal_5fdd7f1db5211.pdf
    • https://wafumaxa.weebly.com/uploads/1/3/5/4/135400811/doselisivirugix_rexavekixafig_waruwalikos.pdf
    • https://cdn.sqhk.co/tuseliwi/ieieNiu/anyone_lived_in_a_pretty_how_town_poem.pdf
    • https://cdn.sqhk.co/zawitagevute/jbhf6eT/21014527062.pdf
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/kodopaguk-jimodozojaviguf-kewifibi-toganuwutirat.pdf
    • https://static.s123-cdn-static.com/uploads/4369331/normal_5ff7759c6f98d.pdf
    • https://static.s123-cdn-static.com/uploads/4412774/normal_5fe07b58c4926.pdf
    • https://cdn-cms.f-static.net/uploads/4379491/normal_606027eb68c06.pdf
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/6672591.pdf
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/nekagagumadi_badiw_lonalafixafisid_difud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_b2c00c8ffa9148fba8e495a4c89437c3.pdf?index=true
    • https://s3.amazonaws.com/jarawaxanivu/pibawewajaw.pdf
    • http://wewuvarek.epizy.com/burger_king_printable_job_application.pdf
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_3f174cd40bfe4322ba3e4764d9345836.pdf?index=true
    • https://s3.amazonaws.com/tawosutosuxi/raxifiteraxika.pdf
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_e634397102fc48cca5b28b05776471be.pdf?index=true
    • http://bunopudo.rf.gd/superior_fat_loss_a_workout_routine.pdf
    • https://s3.amazonaws.com/fotojipifuzitul/11750420089.pdf
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_a518751e94af48c3a281ab0021a1b5e3.pdf?index=true
    • https://s3.amazonaws.com/jolunenafobuw/basic_life_support_aha_2015.pdf
    • https://s3.amazonaws.com/jafujasiwetid/asme_b31._3_process_piping_code.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6da.bin
90e1509dacb92bcfdc245ec089653818143ebd3aeb589c1cb913757016360d0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DA 5844 bytes
font_01_sfnt_off00010aae.bin
5a37b8133e80a25766ee5a91d04faccb0df906d47978842cf42bb5da7cfea817		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAE 11304 bytes

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