Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c57d97848db26f9…

MALICIOUS

PDF

70.0 KB Created: 2021-03-13 17:14:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 43d101578b2286caf148e54dac8437bd SHA-1: b2bb038f0fa895dce89e16109db6807dbda9e8df SHA-256: 0c57d97848db26f9f8a5802cfc1d1059366bf6aed846ad7021c86ba1fa228c73
186 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
  • 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://soxebez.ru/award?keyword=acls+study+guide+5th+edition+pdf PDF link annotation
    • https://gudozegibuxof.weebly.com/uploads/1/3/4/7/134732985/5893926.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/Wxiaij7/wegela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482207/normal_6032cad33f554.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/jDhbhji/39354113267.pdfIn PDF document text
    • https://cdn.sqhk.co/biloriput/ibxjdlZ/septic_tank_installation_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5fd973303b0bf.pdfIn PDF document text
    • https://ramimuluvisefo.weebly.com/uploads/1/3/0/7/130775145/fenit_bokakelu_fubeweja_wovodomako.pdfIn PDF document text
    • https://xewurilarigifu.weebly.com/uploads/1/3/4/2/134236076/5333d0585d28ede.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/ijggjjc/zelaleru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370560/normal_5fc5a5040a08e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457563/normal_6048ee9f5e4ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_c38b6a017a3f44bf818d90de8222e6b5.pdf?index=trueIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_5100c55e7b55407d983a75178401328b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bomupi/social_enterprise_alliance_gift_guide.pdfIn PDF document text
    • http://bikutuvuxaxixo.epizy.com/agenda_for_shareholders_meeting_template.pdfIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_5047f51b3dd44f34a731bab4a17a961d.pdf?index=trueIn PDF document text
    • http://tufuripisaren.epizy.com/21790475785.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/integration_of_cos2x_sinx_dx.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_off0000d36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36B 5328 bytes
SHA-256: 065cc6017dadf3036c6468e3224d77d4ffb6d558e54eaf3a297cc2b673eaa457
font_01_sfnt_off0000e5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A2 11012 bytes
SHA-256: 3106cf91a70791647f565a0df7cd5617b2bb31476ed2a981d16fd69913506b7b

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