Malicious PDF — malware analysis report

Static analysis result for SHA-256 a900115e6b6db334…

MALICIOUS

PDF

77.8 KB Created: 2021-03-19 14:55:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42fa781da4d5f2ecb83d3dfc7023ff32 SHA-1: 2aa39050acc93af5dbc5cf807d4194bde2c91eb6 SHA-256: a900115e6b6db334c0ccd20998d392efd6b384fd61aa2c5dacf9d830bcee15ff
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, likely intended to deliver a phishing lure or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to educational content, suggesting a spearphishing attachment attack vector.

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://golowaki.ru/wix?keyword=ap+world+history+chapter+10+test+answers
    • http://izzzaaa.space/gps_garmin_oregon_450_ebayvjtui.pdf
    • http://alexsaf.ru/do_you_bounce_in_beer_pongdewqw.pdf
    • https://cdn-cms.f-static.net/uploads/4503387/normal_5fd99e7748d9b.pdf
    • http://khareedforosh.com/583730881147a6kj.pdf
    • https://cdn-cms.f-static.net/uploads/4454547/normal_6047070cc7b39.pdf
    • http://card2card.live/videfofutimepuderdtnyd.pdf
    • https://cdn-cms.f-static.net/uploads/4451750/normal_601bbcd9b1cde.pdf
    • https://static.s123-cdn-static.com/uploads/4421360/normal_5fc6d5ec85bd0.pdf
    • http://kulinar2020.site/ziyarat_aale_yasin_downloadmezsa.pdf
    • https://static.s123-cdn-static.com/uploads/4426072/normal_5fca4749aac43.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fotojipifuzitul/tinovitiju.pdf
    • https://5e1449e8-5ae4-4a15-bc7a-ee23795bc964.filesusr.com/ugd/3a34a5_97619905a5a24a7c9e8b2a18f4e4e69d.pdf?index=true
    • https://fcef513a-4692-48cf-ab01-3d1382c723c9.filesusr.com/ugd/c8683e_565dc75530b04f8cb800b669fe9f2100.pdf?index=true
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_dc6ce500a18a4b6ea44d5dc456120430.pdf?index=true
    • https://s3.amazonaws.com/gezizefefififa/how_much_does_a_9.9_mercury_weigh.pdf
    • https://s3.amazonaws.com/votawawo/progress_report_comments_for_iep_goals.pdf
    • http://wetulokavavute.epizy.com/strong_systematic_theology.pdf
    • http://sewadereweben.epizy.com/magnavox_vcr_dvd_recorder_zv427mg9_manual.pdf
    • https://s3.amazonaws.com/jazofi/survival_games_minecraft_servers_1.8.9.pdf
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_dbfb55b8050344dca666eefbcaa42bea.pdf?index=true
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_53f10c9a498f4295b44d9326f0a3a467.pdf?index=true
    • http://zupukafejobe.rf.gd/46922446469.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_off0000f38f.bin
ad790e3cce3aeb9cb351adccdcb5ae1b96f81e8815cb3e55e3a512e8b3f267e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF38F 5540 bytes
font_01_sfnt_off00010676.bin
b33ae7a4681d481f01c85cbb1132225177e0115f65c850890ebe0129b9e1a455		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10676 10448 bytes

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