Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7e6af9f57fbfe9…

MALICIOUS

PDF

72.7 KB Created: 2021-03-03 01:26:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a7cb93244435d417ca995376b6d22788 SHA-1: 719bb29bb4a6413575ea0be597b6b5cdef3eb6c4 SHA-256: 0d7e6af9f57fbfe973206d721d885a77d05bcf2027957ee29ffa141f9407968d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing sites, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as Pdf.Phishing.Trojan. The embedded URL points to a suspicious domain, likely serving as a lure or a distribution point for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=how+to+make+spartan+bat+stickers+at+home PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414166/normal_5fcefa8726725.pdfIn PDF document text
    • https://cdn.sqhk.co/jaguwubax/itieigQ/road_riot_snes_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/bBgiixj/52712073248.pdfIn PDF document text
    • http://xonejixa.22web.org/dell_alienware_aw3418dw_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/kanemili/gheMkgj/kit_club_de_cuervos_dream_league_soccer_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/sugutomipu/4FK5mgh/rumijoxoligilewofaja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492286/normal_5fdc2f289fd71.pdfIn PDF document text
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/d31226.pdfIn PDF document text
    • http://sumaralomemev.iblogger.org/dukugikajixir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sinuwosoko.rf.gd/22043941053.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/21070228546.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/present_future_tense_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/mamopisabiwas.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/gilugivuzosokalevit.pdfIn PDF document text
    • http://loxosufodu.epizy.com/58661413525.pdfIn PDF document text
    • http://guzeberipavol.rf.gd/photo_cutting_app_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF11 5400 bytes
SHA-256: b671a57eb56e34b0d8f58757dfe80b6d962894ec292cf4e468bb8e913d53f60f
font_01_sfnt_off0000f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF149 10684 bytes
SHA-256: ee6acb1725480c75c5e6fa2459fb46683fa740ffcbc68a66f5c31a576b8a959e

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