Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4359abee5927d5…

MALICIOUS

PDF

75.6 KB Created: 2021-03-15 18:08:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2457793602fdeaf0986bea0ed8716a38 SHA-1: bd29d0d9df6dc9c56db4a74298b775f96dfc9008 SHA-256: cf4359abee5927d514a59d7eb5c1abe4c05d4f986e6698df0f983d2b4279907e
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The document body, though heavily obfuscated, contains text related to 'fishing bait catfish tips', suggesting a phishing lure. An external URI pointing to 'https://botokaw.ru/strik' was extracted, likely serving as the malicious payload delivery or redirection point.

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://botokaw.ru/strik?utm_term=fishing+bait+catfish+tips
    • http://gakmancreatures.ru/61362748298phgik.pdf
    • http://soul-felt.com/angular2_date_pipe_custom_formatm2c5z.pdf
    • http://dutov.org/best_wagner_paint_sprayer_for_trimlahew.pdf
    • https://cdn-cms.f-static.net/uploads/4473903/normal_601d711ed3027.pdf
    • http://copyrighthelpcentral.com/fanolupagudokexugijxti4f.pdf
    • http://frontend-developer-azaynullin.site/csgxr.pdf
    • http://legiontry.online/bank_of_america_merrill_lynch_corporate_card_pinuugiq.pdf
    • https://static.s123-cdn-static.com/uploads/4381340/normal_5ffe9127340c5.pdf
    • https://static.s123-cdn-static.com/uploads/4409250/normal_5fe42fe8edb29.pdf
    • https://static.s123-cdn-static.com/uploads/4407777/normal_6006f0a9c9157.pdf
    • https://cdn-cms.f-static.net/uploads/4426413/normal_6033f235f0df8.pdf
    • http://uablog.site/english_songs_websiteea4v7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wovisak/kinumesefowagefad.pdf
    • https://s3.amazonaws.com/remuv/avast_pro_full_crack_terbaru.pdf
    • https://uploads.strikinglycdn.com/files/ee6f3b1c-ee1b-491f-8b90-f02c097a910d/hp_officejet_8600_drivers_download.pdf
    • https://s3.amazonaws.com/dixaleko/denton_tx_police_accident_reports.pdf
    • https://s3.amazonaws.com/woxewiwupir/ferovupoxu.pdf
    • https://uploads.strikinglycdn.com/files/d76c404a-4bad-4e85-9c4f-6878b83abebd/ganazovutemekutipujiwiv.pdf
    • https://s3.amazonaws.com/jexijer/72697007545.pdf
    • https://s3.amazonaws.com/donukadizolin/88741531882.pdf
    • https://uploads.strikinglycdn.com/files/a5ee6899-79cf-4bf4-bcd5-279b34f1c95c/life_cycle_9500hr_exercise_bike_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/ec5be111-515e-4380-bf31-47ff79043445/zinadukakefogix.pdf
    • https://s3.amazonaws.com/tojabixefova/xubofewas.pdf
    • https://uploads.strikinglycdn.com/files/56925e27-5b29-4d20-b4a8-8b7c478493ca/cisco_air-lap1142n-a-k9_eol.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_off0000ebb2.bin
adb7564420fd316c781940338c2a8213f31a69c3fdffa64eb2956fccea2e8b4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB2 5244 bytes
font_01_sfnt_off0000fd96.bin
005eac8061953bcb5d2a7eba99efad694be4335684494bdf16a3f445d165cd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD96 10384 bytes

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