Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dfc32b88e8acbab…

MALICIOUS

PDF

78.8 KB Created: 2021-02-28 14:22:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2908eb286c416d5dc18d571f861816e4 SHA-1: 9c181378920d0ba21e88ec7ecf46a25c6f4d428c SHA-256: 9dfc32b88e8acbab2f3a18643d3752d7560176d10e5cc6c7e0a624de631776cb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=altered+carbon+season+2+explanation PDF link annotation
    • https://livadekawa.weebly.com/uploads/1/3/5/3/135317457/9992755.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxofepure/zhdiaRO/37944142820.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476436/normal_5fc6973c78034.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/jiahdjg/vex_robotics_curriculum_2._1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417992/normal_5fd0719b486d9.pdfIn PDF document text
    • https://cdn.sqhk.co/maxabamed/dDgijqV/20333689787.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444644/normal_5fede77bc0446.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425483/normal_5fc718be306aa.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/LikXjem/save_the_fish_game_fishdom_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470038/normal_60296daa15a94.pdfIn PDF document text
    • https://givurili.weebly.com/uploads/1/3/4/6/134605008/eb2e865bf6b0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456699/normal_6022d56bd4be4.pdfIn PDF document text
    • https://busudege.weebly.com/uploads/1/3/4/3/134392642/tonalosexufo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5fd6e2c722662.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuzodopuvu/ikMukhe/folumibasikemivazo.pdfIn PDF document text
    • https://cdn.sqhk.co/toruwapelot/jSYQhjd/motorcycle_events_in_my_area_today.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimijexap/IoicFgg/giratuw.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/X9k1geT/sutoximuj.pdfIn PDF document text
    • https://radewisuvux.weebly.com/uploads/1/3/4/6/134689192/751114.pdfIn PDF document text
    • https://cdn.sqhk.co/xatijafuwami/NwGDjb2/19224038950.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366017/normal_5fcdc2df65847.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0A 5184 bytes
SHA-256: eaecf6d30ee55829d1665a2df01c95506d5b1f9b2546b92edbed891fcf97f3d6
font_01_sfnt_off0000fba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA2 10604 bytes
SHA-256: 2629bd2c72bd6138f5ea0c964bc710f0d61bd3793fd16c04c7fd523e06c50c09
font_02_sfnt_off00011f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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