Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b78c61b4e65dc5c…

MALICIOUS

PDF

163.3 KB Created: 2021-03-20 11:57:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9817ac80f2bf545d7c8033b75a95b469 SHA-1: 9f2a2e5085fa9f6ebc2998036a859b9fdd3b3601 SHA-256: 5b78c61b4e65dc5c8ab3454cf7be4c8a56dfa4cde12973e39c4af8d4bc1d3b58
96 Risk Score

Malware Insights

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

The PDF file contains a URL that mimics a search query, likely intended to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. No scripts were extracted, but the presence of an external URI and the overall detection suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zajinet.ru/strik?utm_term=what+is+the+period+of+great+depression
    • https://static.s123-cdn-static.com/uploads/4418590/normal_5feef19b2d2b7.pdf
    • https://jizexukufi.weebly.com/uploads/1/3/4/1/134109318/9281230.pdf
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5fd73f6c37da0.pdf
    • https://cdn-cms.f-static.net/uploads/4402718/normal_602301f0aa6b0.pdf
    • https://static.s123-cdn-static.com/uploads/4367923/normal_5fdef0a115e61.pdf
    • https://cdn-cms.f-static.net/uploads/4485322/normal_601c6a78df7bc.pdf
    • http://zavifuvalo.22web.org/vusosagolotepirebigakogid.pdf
    • https://cdn-cms.f-static.net/uploads/4450517/normal_603592bbc7ca1.pdf
    • https://static.s123-cdn-static.com/uploads/4455403/normal_5fdfcd3ab01b6.pdf
    • https://doxazefeseremef.weebly.com/uploads/1/3/4/7/134764644/bexesugimugixujike.pdf
    • https://static.s123-cdn-static.com/uploads/4374540/normal_5ff68137a326b.pdf
    • https://cdn-cms.f-static.net/uploads/4446930/normal_604faa5fa5f25.pdf
    • https://cdn-cms.f-static.net/uploads/4380680/normal_600c6ddc4e1c5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://satekivu.rf.gd/dowenoxudadoxunudiwuline.pdf
    • http://rulenanevatetid.epizy.com/dyslipidemia_screening_guidelines_canada.pdf
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_ab1537350f2b4a179e306bd756c5c934.pdf?index=true
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_c9220a91412141c0ba390743818349a1.pdf?index=true
    • http://vububogux.epizy.com/rifud.pdf
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_003d1be7cbf34370b8cde856504a7195.pdf?index=true
    • http://wefazerigibu.epizy.com/46061444673.pdf
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_f5a8f374684d4c8697ff71d411399d11.pdf?index=true
    • http://soburuwukipo.epizy.com/web_app_builder_templates.pdf
    • http://rilinaga.epizy.com/zivarasa.pdf
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_dc90c76b3dfa405d9aace1c3fc9766ec.pdf?index=true
    • 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_off000244cd.bin
eb17e354c2abbc50be7f3800956d04203b94f8391e1b3472fd2cb2f7f11dbe80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x244CD 5284 bytes
font_01_sfnt_off000256d6.bin
df6031f989609b77b2b079989920d75d9d64b8809fb4c58ca5569e89ef238d89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x256D6 12256 bytes

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