Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0e6cb1673e2ddd…

MALICIOUS

PDF

90.5 KB Created: 2021-03-30 07:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 26e7f2a23257f368fbbcbb67305df766 SHA-1: b3cbdaad992e586a17d96137e12563f7ef3fd084 SHA-256: 7f0e6cb1673e2dddfd9c0a856066c321d42f8fa50839241f50b92c8e98ce0106
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a potential phishing lure related to 'acog cervical cancer screening guidelines pdf'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple PDF links, suggesting an attempt to obscure malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or conducting phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://soxebez.ru/award?keyword=acog+cervical+cancer+screening+guidelines+pdf PDF link annotation
    • https://cdn.sqhk.co/defisepeniba/hiSkqhh/wiwegadami.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486053/normal_5fcaece548edf.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/KZ6ggjj/motorcycle_helmets_shops_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446647/normal_603eeca9dcb49.pdfIn PDF document text
    • http://barefegek.iblogger.org/primary_medical_certificate_form.pdfIn PDF document text
    • http://raftgjgr.space/national_geographic_kids_magazinepcv9b.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/Z8Ugd8r/73147816606.pdfIn PDF document text
    • http://befodafojedugan.22web.org/gerund_as_a_noun_worksheets.pdfIn PDF document text
    • http://pitushok.fun/difference_between_schwinn_230_and_270_recumbent_bikegvs02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473919/normal_6027ad85f1a9a.pdfIn PDF document text
    • https://cdn.sqhk.co/tiviluluje/Ljbgjhe/table_tennis_paddles_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406514/normal_60382afc6bc26.pdfIn PDF document text
    • http://hdsamara.ru/39641579085serp8.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/H3hbiha/guwagazijojokejuvamon.pdfIn PDF document text
    • http://social-whisper.ru/16295720024slabw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wunozoviwo.epizy.com/jilofobexexugejejuxuneli.pdfIn PDF document text
    • http://pegovijodup.epizy.com/behaviour_management_techniques_for_challenging_behaviour.pdfIn PDF document text
    • http://xobabikek.rf.gd/conference_room_schedule_template.pdfIn PDF document text
    • http://berojopuzenon.rf.gd/16805505992.pdfIn PDF document text
    • http://zimemotom.rf.gd/wefutonaresenif.pdfIn PDF document text
    • http://mopafanimuwez.epizy.com/mixed_model_assembly_line_balancing.pdfIn PDF document text
    • http://jusowegakero.epizy.com/49077500326.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_off00012601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12601 5372 bytes
SHA-256: 990a9563a35bfe440d7529535b5263106bd41a9263cc713c3fe189899dd86710
font_01_sfnt_off0001385e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1385E 10688 bytes
SHA-256: 9a082729b0f26bc497c92015dd89a126f2b130446617af904cd9ffafbf17f343

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