Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2bc78fd01c92f6…

MALICIOUS

PDF

70.9 KB Created: 2021-03-10 11:55:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c2691256fbd212b3dad6ed0810246c9e SHA-1: 2da51c933d2c7505c37d0268c2c06156f1c888c3 SHA-256: 3c2bc78fd01c92f6e0441342d7cb1ba0ce9660efd16e59fa7bd54ee323e9fa55
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=minecraft+unblocked+77+88+99 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4366402/normal_5fc5a20f06dee.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/fjgjfWG/kegujawot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_6029a75071062.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479673/normal_5fd9bd48173bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_600c9ff9c22e0.pdfIn PDF document text
    • https://cdn.sqhk.co/buwisotubu/hNOePjg/34576910541.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449622/normal_6002a0adf3a90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405654/normal_603fd4d646fcf.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/icNDegj/classic_runner_adventure_park.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404755/normal_5fe434e367552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_603bfe593f106.pdfIn PDF document text
    • http://keribek.22web.org/lisaruteg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suvubojetixag.epizy.com/belif_whitening_facial_sheet_mask.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dcef96d-0d60-4236-987a-34a3f4848e54/zumolivimonaxafaza.pdfIn PDF document text
    • https://53f03ce6-db0b-4f41-9bfc-6956ba41e1f4.filesusr.com/ugd/727e0f_d67da91f497e440b9a68808bb88c7a69.pdf?index=trueIn PDF document text
    • http://momomalolo.epizy.com/nosql_database_design_guidelines.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_09b5ba1777de4758ba5722d929d940ad.pdf?index=trueIn PDF document text
    • http://xotesevuves.epizy.com/11809358966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d5823b1-d4a3-4a8a-a104-1472d485d585/noxumutadazuliso.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_off0000d805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD805 5476 bytes
SHA-256: 23f2da88955e2422d86a9b46a3e7f4680ccd24abe73587583cf6427152000c49
font_01_sfnt_off0000eac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC8 10356 bytes
SHA-256: 3bd752b7bbb42ce74f728fd04bb0de52dfd7140f15c11f91470634a3f4aa57fa