Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6e9acd95005fa3…

MALICIOUS

PDF

119.1 KB Created: 2021-03-07 08:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4d7f7277367823d7c5efa6bfb1f0299 SHA-1: df6254e5f047d0496ece75409821f8f233cdcaa0 SHA-256: dc6e9acd95005fa37d7a605ef1675ff1e759aca9c548ab84c3330ee9be152bdc
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL leading to a website that appears to be part of a link farm or SEO manipulation scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://dafemum.ru/wix?keyword=lee%2527s+summit+north+dance+invitational
    • https://cdn-cms.f-static.net/uploads/4408336/normal_603ce17d34949.pdf
    • https://static.s123-cdn-static.com/uploads/4484999/normal_5ffed38174c04.pdf
    • https://static.s123-cdn-static.com/uploads/4380237/normal_5ff159090c532.pdf
    • http://verifybadgesbusiness.com/digital_marketing_certificate_programs_usa4kvzt.pdf
    • http://www19216801.site/tailoring_books1yu4v.pdf
    • https://cdn.sqhk.co/dokederajo/SBIG5qQ/diy_super_slime_factory_satisfying_asmr_games_apk.pdf
    • https://static.s123-cdn-static.com/uploads/4459320/normal_5ffc9be8473d4.pdf
    • http://lnstagram-verifedbadge.com/33047046606imv8l.pdf
    • https://static.s123-cdn-static.com/uploads/4369506/normal_5fc67c7423702.pdf
    • http://brandframeb.com/12093185983e86di.pdf
    • http://raluwixisi.22web.org/72784210810.pdf
    • https://cdn.sqhk.co/wixexozesila/YJghKkj/zopujatodo.pdf
    • http://vovality.club/42635768372ejr9f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_c8b3275860a54199b836c094636bc826.pdf?index=true
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_4797b44c2a1d4a70a5de0a8f534aaa5f.pdf?index=true
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_3d1a9629a419458f8d25c9942ec2ea4b.pdf?index=true
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_3c86a53601b14cb4ac8568434edb02f4.pdf?index=true
    • http://felawikemuda.epizy.com/yaar_beli_punjabi_full_movie.pdf
    • https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_0aa05b4e86a549d4833765e9c3dfd2df.pdf?index=true
    • https://01477de9-116b-42a6-a62c-54244336611e.filesusr.com/ugd/dea9e9_05e19979ad00436f94c181d6471723b8.pdf?index=true
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_f2e61b0a73704228977062907b6f3e9d.pdf?index=true
    • http://jisuwexadik.rf.gd/18871962778.pdf
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_20569eddee644c178fc8353943c6793f.pdf?index=true
    • http://bimumebuzof.epizy.com/assassin_s_creed_unity_game_for_android.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_off000196e3.bin
e2bd9101c8eadefee46ad5d6a3c7906c71fc59ad7c1b74aa746f61ff74f17588		 pdf-font-stream PDF embedded font (sfnt) at offset 0x196E3 5216 bytes
font_01_sfnt_off0001a87e.bin
865b94d38eefe5a06debc0fa26fdba748efbb0aef7c9a07b340fc312bfa01cba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A87E 11072 bytes

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