Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9c42dbc8538919…

MALICIOUS

PDF

72.2 KB Created: 2021-03-15 09:01:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 888de5f0873b975d0786ccf0121adbad SHA-1: 2f70bd8798d5e1fd3bfc1302aa102264a96f324e SHA-256: 2b9c42dbc8538919940b720dbaa45d140aa86cb059d4b77c5eebbd7fe2c2402c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://dafemum.ru/wix?keyword=hsfpp+module+4+answers', which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, suggests a lure related to 'hsfpp module 4 answers'. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests an attempt to redirect the user to a malicious site.

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://dafemum.ru/wix?keyword=hsfpp+module+4+answers
    • http://antileqphh.site/dell_optiplex_9020_datasheetozrfb.pdf
    • http://acupofjacob.com/how_to_change_pump_oil_on_generac_pressure_washery1e62.pdf
    • https://cdn.sqhk.co/jasurisunav/jjmGJWA/76340275556.pdf
    • https://cdn.sqhk.co/labokezugumu/hgFijic/bawesuvobanimuzeva.pdf
    • http://all-system7.club/fisojubekofoseip7h.pdf
    • http://resimpub.com/rilivodidujuxisamkp796.pdf
    • http://lnstagramverifiedsbadgeform.com/34898449853f31v7.pdf
    • http://lifeeuro.info/what_the_bible_says_about_christmas_treesyn6uj.pdf
    • https://cdn.sqhk.co/novitovikor/gihdqhi/air_france_flight_booking_online.pdf
    • http://amorexpo.com/hungry_shark_world_para_pcbch3f.pdf
    • http://viewcreditscore.info/vigoxalbpoe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_1668d172da7749d49764e132853ed242.pdf?index=true
    • http://lugaderova.epizy.com/bikivosimafotawifeko.pdf
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_570e6f2d0cfc488ca1d2374ca3a8e8f3.pdf?index=true
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_fb7df9e6e44340989b7ccc9df306bb3f.pdf?index=true
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_95d34b8120304e8f83f91b38b8e4a989.pdf?index=true
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_91874106be0e4dde9d28432414b33c0a.pdf?index=true
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_5a9a8cfcc4284501aab5d2a91c61a43e.pdf?index=true
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_313f9ef6e0ed4ab3b728a5d3f5f61850.pdf?index=true
    • https://e148473a-3d1a-46f8-b788-fbc1f5af68d4.filesusr.com/ugd/e1e70b_9d96033c5413465ab8bc883e21eda123.pdf?index=true
    • http://kesobikifa.epizy.com/types_of_commercial_aircraft.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_off0000daec.bin
4e1ef47b2a2b0cfc8a862d5db0708dae0cf75c406e6bbba03eb4a7a262c0509d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEC 5328 bytes
font_01_sfnt_off0000ed09.bin
1c922439ba936fb43ace3595948de86a81d136d080495ae8b0c5ef25502e089f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED09 11476 bytes

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