Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42458296f660be1…

MALICIOUS

PDF

76.6 KB Created: 2021-03-10 08:39:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 03dd21da366fb59746733f70b4a542b7 SHA-1: 9ef4e72f4fc38aa22a4fdc6e515798e200852f43 SHA-256: f42458296f660be11aeab6bf15c0302885dcfda61e394a087f0e247c9602ec65
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://botokaw.ru/aws?utm_term=computer+parts+shop+near+me PDF link annotation
    • http://arenda-comp.space/559345029663kwdu.pdfIn PDF document text
    • http://gimakelodikovij.iblogger.org/office_365_exchange_administration_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494663/normal_5fff83878e359.pdfIn PDF document text
    • http://xovekofetovo.66ghz.com/genting_arena_formerly_nec.pdfIn PDF document text
    • https://cdn.sqhk.co/gesuxafom/ensQnYj/ligudusosi.pdfIn PDF document text
    • http://fonabibexame.iblogger.org/modded_apk_market_nomao_app_free.pdfIn PDF document text
    • http://ig-support-service.com/rayuela_julio_cortazar_edicion_conmemorativavv8tb.pdfIn PDF document text
    • https://narapafugoziror.weebly.com/uploads/1/3/0/7/130775848/ruwesakop_sodexisizopi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491451/normal_5fdc3370246e2.pdfIn PDF document text
    • https://cdn.sqhk.co/tawibonikigo/gfJ2NWa/toketuporixulap.pdfIn PDF document text
    • https://cdn.sqhk.co/xixofivib/oBDTgcA/mixupubelafamanubulit.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/aibjbY7/56897800515.pdfIn PDF document text
    • http://zofanelo.22web.org/acordes_de_la_cancion_el_poder_de_la_oracion.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/hhVigdc/singing_machine_karaoke_app_free.pdfIn PDF document text
    • http://websporizle4.com/vigawabilanoxanubufopoq6ipe.pdfIn PDF document text
    • http://pigozolifafaw.iblogger.org/luvatawilet.pdfIn PDF document text
    • https://malosopiwa.weebly.com/uploads/1/3/2/6/132695478/rigeseribo-dosiliwuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wasuragexoledar.epizy.com/marginal_cost_sheet_format.pdfIn PDF document text
    • http://telijekiw.epizy.com/nusodadiwak.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_off0000efd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD6 4932 bytes
SHA-256: 1990898ffa91c7bcaf67fda75ea9ed6b488713f754ebe3d645353f6a4bf1a4c1
font_01_sfnt_off00010062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10062 10900 bytes
SHA-256: 7d31bda48c69683557a6342cc070ab71ee583fddc3ddc271d391ca7e223647ed

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