Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bdf0644fadebc29…

MALICIOUS

PDF

78.3 KB Created: 2021-04-06 10:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8aa94d98bbc8db5537aad1c67d61ccf4 SHA-1: b30a6527be7221c613b384ecb7642d3115f2c638 SHA-256: 8bdf0644fadebc29ee961a787c203ad94d345852dacab73333be2a9e1fd96613
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a primary focus on 'https://ponafet.ru/wix?keyword=amazon+area+manager+review'. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing lures.

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://ponafet.ru/wix?keyword=amazon+area+manager+review PDF link annotation
    • http://titanof-filtr.ru/zeluwaturilejipukv2s8.pdfIn PDF document text
    • http://baffer-shop.space/how_to_avoid_fallacies_in_an_argument7jtqz.pdfIn PDF document text
    • http://look-hotel.com/auriol_font_freeraqzr.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/estructura_de_los_textos_narrativos_inicio_desarrollo_y_finalf9h1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420438/normal_6001f23d88218.pdfIn PDF document text
    • https://cdn.sqhk.co/fepixuzutol/N0jdj9h/thk_linear_guide_selection.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392453/normal_6016abf33242f.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/qjheAge/15343806086.pdfIn PDF document text
    • http://jakartapro.xyz/word_finder_game0ezbr.pdfIn PDF document text
    • http://lightstart.xyz/10754989459awjmt.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/are_troy_bilt_riding_mowers_any_good.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485929/normal_604e44db87be5.pdfIn PDF document text
    • http://birjand.design/dominos_order_online_pay_cashdpomo.pdfIn PDF document text
    • http://insurancesouk.com/bimemufuvirikevibafipofes9oqid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401716/normal_60353f5ecee24.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tulajadulixo.myartsonline.com/19841071409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea317e8f-1b21-4a7d-80c9-159aef077d84/powermax_85_error_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d0057c-5d93-4428-ad70-662c5d20b761/zusulevojekodukuxedalojo.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_off0000f2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F9 4984 bytes
SHA-256: 88a91afd9b5cc7e699aa1a6e6863ef96c36b12c618acb4f67a5db25db8cda328
font_01_sfnt_off000103ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EF 11252 bytes
SHA-256: 6f8506a8338366822323e0248e88516089698a21378c9534db1e11a2ef795aa6

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