Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f07b2ed74186d2a…

MALICIOUS

PDF

85.3 KB Created: 2021-03-17 07:05:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 713cc8ee14d99846b4a9e77743b6fd66 SHA-1: 9050cacf8114710c8f251df88008216d8da43444 SHA-256: 2f07b2ed74186d2aa9d7164f5de4b8e2a908462e8d08e5c9a456a912a0a90c60
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/wix?keyword=effectual+entrepreneurship+pdf+download
    • http://figuxovutofid.mygamesonline.org/pekemojofa.pdf
    • https://cdn.sqhk.co/goberirud/cPhfEgi/diaphragmatic_breathing_exercises_dysarthria.pdf
    • http://agencymedia-ig.com/room_on_the_broom_book0vp5j.pdf
    • http://damita.fun/used_viking_spa_for_salegyk4v.pdf
    • http://derilezin.sportsontheweb.net/derosuvizug.pdf
    • https://cdn.sqhk.co/sukonazukuv/jhcVBkM/the_bucket_list_book_review.pdf
    • http://zanovekolasin.mywebcommunity.org/loxofivajuzuk.pdf
    • https://cdn.sqhk.co/sitopizol/ilQggAj/bacula_windows_client.pdf
    • http://sakepugikunon.mypressonline.com/18100551577.pdf
    • https://cdn.sqhk.co/foropogajag/ChUU0ia/48758388769.pdf
    • http://pozuvixa.getenjoyment.net/john_deere_x320_manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_1c72289ff2cd4b8297e28fa95b944d61.pdf?index=true
    • https://s3.amazonaws.com/tufitijinexu/jegegasefapape.pdf
    • https://s3.amazonaws.com/dorobukasawituw/fejugujukunede.pdf
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_5314e8ef89614267974fd491e1ba3b8d.pdf?index=true
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_df1a8370c1314bcb98b4b09a48c84434.pdf?index=true
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_651f6654969e4ecb81a9db78b2f973bd.pdf?index=true
    • http://dolanuvusipegu.myartsonline.com/onan_7.5_hdkaj_service_manual.pdf
    • http://nakarajibap.myartsonline.com/how_to_return_cutco.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f71f.bin
8cfa01459329943d6595977334e88d39f2556a0f2f70c93656be90bdad54ea30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF71F 5292 bytes
font_01_sfnt_off0001092d.bin
2dbaf3458b97d518c49874c97f8bc7dd92b50a5f50e57f4441d2b6c27782071f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1092D 11500 bytes
font_02_sfnt_off000130a6.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130A6 16204 bytes

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