Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ace1009518e0e78…

MALICIOUS

PDF

88.1 KB Created: 2021-02-22 15:29:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc56a9ce3a08d0a37194f2787e44449b SHA-1: 91c5897896196f1d0694e779a9e50b3de60f837a SHA-256: 8ace1009518e0e7807ed9626cbe257d4cd6db5a9702603588fb7e4da03059f05
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain related to 'Texas cdl renewal cost', suggesting a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of malicious intent, likely to redirect users to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=texas+cdl+renewal+cost
    • https://cdn.sqhk.co/sorubajuzoxe/ZGi2Rgh/gejesazivetavoma.pdf
    • http://gonaxepafa.iblogger.org/tikajenesojit.pdf
    • http://shopbest.online/blackburn_trakstand_ultra_setupds3eu.pdf
    • https://cdn.sqhk.co/rewazexi/hNggkic/land_rover_defender_2020_car_and_driver.pdf
    • https://cdn.sqhk.co/sedazozesufu/giK84id/modern_house_minecraft_map_pc.pdf
    • http://yoptan.space/509677866100a48z.pdf
    • http://latencfsrt.space/anthem_bcbs_medicaid_prior_auth_formpa41s.pdf
    • http://sinakarazeg.22web.org/drudge_report_app_removed_from_google_play.pdf
    • https://cdn.sqhk.co/reriwoduriju/f72qwxE/empire_conquest_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/besafefaf/21456100661.pdf
    • http://refufigatuzar.epizy.com/vet_tech_programs_maine.pdf
    • http://jinegudizoropi.rf.gd/shark_navigator_xl_upright_vacuum_reviews.pdf
    • https://s3.amazonaws.com/nerugiraxura/wogedini.pdf
    • http://gigavolaxo.epizy.com/57060261704.pdf
    • https://s3.amazonaws.com/zisulamisozoto/how_to_get_your_music_noticed.pdf
    • https://s3.amazonaws.com/woberiz/lojajewojaxumuwifopexud.pdf
    • https://s3.amazonaws.com/roware/biomedical_waste_management_2018_guidelines.pdf
    • http://lokimutopilar.epizy.com/everybody_knows_asghar_farhadi_free.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_off00011be2.bin
6a915c92015d8a3e9131bc1cb33819780a7fd51589b7763a1db85c0a82021f30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE2 5044 bytes
font_01_sfnt_off00012d27.bin
bba3bc761480c59eec4772d171a99d6f95164e53e69e07b370c4f395f74516ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D27 11176 bytes

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