Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d7eb765bc4bc39e…

MALICIOUS

PDF

75.5 KB Created: 2021-03-30 20:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3092562ae6d6d09f2a38104ccca73e14 SHA-1: 68d9a903ba44dca51a677c28ef01a19b9f2a8878 SHA-256: 8d7eb765bc4bc39ede08a2bca0f376b6c1e0cc51483d796c2c949a3bf7519bb0
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and a heuristic firing for PDF_SEO_DISPOSABLE_LINK_FARM indicates it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure that redirects users to malicious sites, potentially for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/award?keyword=cantabile+et+presto+flute+pdf PDF link annotation
    • https://cdn.sqhk.co/dodagirojep/hfhig7K/66816248816.pdfIn PDF document text
    • https://cdn.sqhk.co/vifutetax/iEuhehb/77105139713.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/riwutosax/gjiXGji/d_d_adventurers_league_character_sheet_5e.pdfIn PDF document text
    • http://zabopibisoxe.22web.org/94893342561.pdfIn PDF document text
    • http://flebolog24.com/why_was_the_american_chase_cancelledutdeb.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/vLzCHgi/tulusela.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/mrZGcgg/zalerelejudegelelet.pdfIn PDF document text
    • http://front-glass.space/define_biological_oxygen_demandksd6s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_40321664096c4809ace9439be65d204e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/jojoranelinevitat.pdfIn PDF document text
    • http://dolaregasa.epizy.com/2006_nissan_altima_owners_manual_free.pdfIn PDF document text
    • http://mifasujabad.epizy.com/81277187211.pdfIn PDF document text
    • http://nazonuretowu.epizy.com/67978431338.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/que_son_los_ansioliticos.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/citizen_blue_angels_stopped_working.pdfIn PDF document text
    • https://8d9f32f1-468a-4e6e-8fd0-236262902e57.filesusr.com/ugd/28860c_44a35495ed8749f18d9d7526efa1210d.pdf?index=trueIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_271fdfe400254559a438568d4de7bceb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/puxizisapipuvat.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_719e5118be374d91bdc807daf20e8d70.pdf?index=trueIn PDF document text
    • http://jopawozav.epizy.com/96054746604.pdfIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_ed9224b55629404dbebbe7f90e73752b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/what_is_a_word_for_lack_of_conscience.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/10088507848.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_off0000e925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE925 5080 bytes
SHA-256: 5a9148b34e68639ccfafac04b364398de3b65135f04af3731cfa8dd231e577c0
font_01_sfnt_off0000fa6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6A 11396 bytes
SHA-256: 79416a47ec7e9eec729deb4fe8131712893ae5c43ca686f256420490737742f1

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