Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccaed9cf67622357…

MALICIOUS

PDF

86.7 KB Created: 2021-03-20 01:48:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3f8ef341a72493f37eaac8bda5ff5d2b SHA-1: 50969ce8d4042d2fa867a1fd167ee8259ebad8c1 SHA-256: ccaed9cf67622357b0ec67926edcb38834cd44d6ee431e0c3ae7e73b511de4bc
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as a link farm and by ClamAV as a phishing trojan. It contains numerous external links, with one pointing to 'https://vilenefex.ru/award?keyword=estatismo+y+anarqu%25C3%25ADa+mijail+bakunin+pdf', suggesting a potential phishing or SEO-based malicious campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/award?keyword=estatismo+y+anarqu%25C3%25ADa+mijail+bakunin+pdf PDF link annotation
    • https://govexofube.weebly.com/uploads/1/3/1/8/131872198/vefos_dutalafisir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378425/normal_5ff2df7cc445b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413968/normal_6012cd8137eaa.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/DjaFBhc/microsoft_gantt_project_planner_template.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/SkMFjhk/tiktok_starbucks_drink_sweet_cream.pdfIn PDF document text
    • https://petavigavixate.weebly.com/uploads/1/3/4/4/134459614/01c7e.pdfIn PDF document text
    • https://cdn.sqhk.co/padezeda/eUjahiJ/zefolijerilaxagufutoseta.pdfIn PDF document text
    • https://ponogabema.weebly.com/uploads/1/3/4/1/134108944/8002285.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390680/normal_604dbbd1685ff.pdfIn PDF document text
    • https://dofigova.weebly.com/uploads/1/3/0/8/130813881/gaseporepazo-zigofu-vafad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_30bc4d13e3654a92abf53a0a36b400d2.pdf?index=trueIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_c7df6f79fa544797b681a12411251539.pdf?index=trueIn PDF document text
    • https://f3b86e06-b3aa-4ee1-82f7-79049f3379a8.filesusr.com/ugd/0c4fd2_d8a2d88abffa4754a460e281fa048262.pdf?index=trueIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_5224e94d2b2a46f59927dbfefd2276f3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/befarekogol/mexodikuzoxelunuberoxamif.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/will_brushing_my_teeth_3_times_a_day_make_them_whiter.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/antistress_apk_mod_full.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_39e1736c86d0418f924cd55c6f2ddf3a.pdf?index=trueIn 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_off00010dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD6 5708 bytes
SHA-256: d8eaa88a21836c0e190b65f4e119d0fb9a088f29daba3fad350899c29ca7fa71
font_01_sfnt_off0001213c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213C 13688 bytes
SHA-256: 37167b6cedf4a99b1ba89c7f98ae24170c0aab224999ae4d9ecd5ff309dd4d19

Open this report in the interactive analyzer, or submit your own file for analysis.