Malicious PDF — malware analysis report

Static analysis result for SHA-256 c078b3be0860907c…

MALICIOUS

PDF

77.2 KB Created: 2021-03-16 03:59:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 840b350b332283d92cf1a1aa44e4c0c2 SHA-1: 59833ef2b7295288e0d9172addcc3e51850d07c2 SHA-256: c078b3be0860907ce8c5cc3fdd958ac5d62f5821a1ec28dcb764e106036dbbe1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload. The document body, though heavily obfuscated, suggests a lure related to 'free johnson outboard motor repair manuals'.

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://seumenha.ru/strik?utm_term=free+johnson+outboard+motor+repair+manuals
    • https://vofamebibefa.weebly.com/uploads/1/3/4/6/134694090/7695ad49.pdf
    • https://cdn.sqhk.co/leporolino/ijbrsjB/multiplayer_shooting_arena_mod_apk_unlimited_money.pdf
    • http://triple-doska4.club/adobe_acrobat_dc_trial_offlinemwfd2.pdf
    • https://cdn-cms.f-static.net/uploads/4447258/normal_603833e7d2e25.pdf
    • http://stankoff.org/binomische_formeln_bungen_schwernl903.pdf
    • http://remontnatali.ru/cambridge_english_advanced_writingumfpd.pdf
    • http://modernstyle.pro/17893191360y6myg.pdf
    • https://jaxedafotonomut.weebly.com/uploads/1/3/4/8/134885779/7286311.pdf
    • https://tadinitalu.weebly.com/uploads/1/3/4/7/134744808/9cedaa3a67e16a6.pdf
    • https://kirorasonosa.weebly.com/uploads/1/3/4/7/134743937/sedepuvaf.pdf
    • https://ladujeka.weebly.com/uploads/1/3/0/9/130969399/femeguzogifog-pokenoradew-talemug-gakepisi.pdf
    • https://kexoxuneve.weebly.com/uploads/1/3/4/5/134501441/zugokafolokuza.pdf
    • http://openplafond.xyz/tutepatagabogobonomiva51941.pdf
    • https://static.s123-cdn-static.com/uploads/4366630/normal_5fef9cba8dc86.pdf
    • https://dunopupusegujuz.weebly.com/uploads/1/3/4/3/134348927/8748168.pdf
    • https://cdn.sqhk.co/foseziwate/dH6thfK/tidixulezagoniguvaro.pdf
    • https://cdn.sqhk.co/nojedajoze/bwagfid/jeximodameka.pdf
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5ff36c18d8793.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/58e9c2e5-d715-455f-b864-20cbcc30132b/stairway_to_heaven_tab_songsterr.pdf
    • https://uploads.strikinglycdn.com/files/6686333f-773b-4414-a2b6-ecaa3c1bc925/ejercicios_de_derivadas_de_funciones_trigonometricas_resueltos.pdf
    • https://uploads.strikinglycdn.com/files/50b70b73-24d1-4633-b641-036258d7bdba/67147580337.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_off0000f318.bin
5271b0c7634bccc20347263c97087294c29d658b71e14d88b5a11dd756b58f83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF318 5372 bytes
font_01_sfnt_off0001052c.bin
351cd38ccb4ad3db614e88be153ddf6d69f72682e95c222b7461033d95a0b2b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1052C 9892 bytes

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