Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbf60ac4055757c…

MALICIOUS

PDF

77.5 KB Created: 2021-02-23 21:17:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24c925d31f3daceca61a819697426cea SHA-1: c13f23675ea1a4caf47a884870aa9f94d86cbf53 SHA-256: 0dbf60ac4055757c0ae8430e08b6c27ef4ddc617beaf1478f0e9f7b938384cda
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains embedded URLs, one of which is used as a lure for a "Jamaican vegetarian cookbook pdf". The ML classifier and ClamAV detection strongly indicate maliciousness, likely a phishing or trojan delivery mechanism. The presence of multiple external URLs suggests an attempt to redirect the user to malicious content or download further payloads.

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://bologen.ru/wix?keyword=jamaican+vegetarian+cookbook+pdf
    • https://cdn-cms.f-static.net/uploads/4374838/normal_6024f20a5840d.pdf
    • https://static.s123-cdn-static.com/uploads/4408864/normal_5fffa17e0aa70.pdf
    • https://cdn.sqhk.co/wujamufaw/jdjh3jj/zufefe.pdf
    • https://cdn-cms.f-static.net/uploads/4503584/normal_601f3f42ed0c6.pdf
    • https://cdn.sqhk.co/sabumijobude/CZifxhh/zero_gravity_ball_pigeon_forge.pdf
    • https://cdn.sqhk.co/kovezozeseg/gdiagiW/13457916576.pdf
    • https://cdn-cms.f-static.net/uploads/4407070/normal_60219eb40aebb.pdf
    • https://static.s123-cdn-static.com/uploads/4454043/normal_5fcf2ec18ab69.pdf
    • https://cdn-cms.f-static.net/uploads/4493541/normal_6023bb93551d5.pdf
    • http://salejozokaboruz.22web.org/mass_effect_andromeda_trophy_guide.pdf
    • http://folotexuxopig.iblogger.org/41893504481.pdf
    • https://static.s123-cdn-static.com/uploads/4391024/normal_6005207f9971d.pdf
    • https://static.s123-cdn-static.com/uploads/4484633/normal_5fdcae5614264.pdf
    • https://cdn-cms.f-static.net/uploads/4456998/normal_6011a834e2e5b.pdf
    • https://static.s123-cdn-static.com/uploads/4413718/normal_5ffe73440e311.pdf
    • https://cdn-cms.f-static.net/uploads/4379842/normal_601cb1b236f7d.pdf
    • https://cdn-cms.f-static.net/uploads/4462066/normal_5fda067d96b50.pdf
    • https://cdn.sqhk.co/sojowidaz/o9jjwgi/latest_mlb_covid_news.pdf
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5fd7464d6e281.pdf
    • https://cdn-cms.f-static.net/uploads/4451971/normal_600b046e1967d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gexefafuli.rf.gd/vakaku.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_off0000f1bb.bin
9d9cfb541fb98b577771fe21e92cada0e6975c4cd7c7c2dca8983441be6d47e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BB 5516 bytes
font_01_sfnt_off00010475.bin
71bfe9bac5bbb1e68fba5cb5173471249cce82fb66b7356c68d743d629e620ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x10475 10608 bytes