Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f010fb2a38dea65…

MALICIOUS

PDF

71.4 KB Created: 2021-02-18 23:05:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: baefb494be4a288fa668f414afdccffc SHA-1: be329e87c17489b711636f6598efdad2e799ac45 SHA-256: 8f010fb2a38dea657d9b31be2be25d1cf521947847d67fb25cb402e31e53ab09
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/123?utm_term=dc+motor+position+control+using+pid In PDF document text
    • https://static.s123-cdn-static.com/uploads/4378827/normal_5ff82c275798b.pdfIn PDF document text
    • https://rukufutuseju.weebly.com/uploads/1/3/4/7/134748195/2207000.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/d2b02022a6.pdfIn PDF document text
    • https://wabaxudazisivi.weebly.com/uploads/1/3/3/9/133986682/14714.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402951/normal_5ffebfe6cd96f.pdfIn PDF document text
    • https://nofodomeki.weebly.com/uploads/1/3/1/8/131871852/61a04436117ee8a.pdfIn PDF document text
    • http://creditpm.com/ios_13_developer_beta_freek9wgz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471467/normal_6016925d08a4f.pdfIn PDF document text
    • http://discout.online/caged_2010_full_movie_freeqof2n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493610/normal_6029270a02da6.pdfIn PDF document text
    • https://nexitikobimefa.weebly.com/uploads/1/3/0/7/130776699/lejevipo_dosuj_nixubud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446285/normal_600b6149be81d.pdfIn PDF document text
    • http://wei-nmvc.com/best_android_tv_file_explorero3hyp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472503/normal_6013c02526cc4.pdfIn PDF document text
    • https://tizirabavapamob.weebly.com/uploads/1/3/1/4/131453045/deloritozanoda-musaforug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9B 5184 bytes
SHA-256: 28e9863f675e550a041d2bfefc003fe3bb39c2896089308d71dcea00eda2241a
font_01_sfnt_off0000ed29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED29 10424 bytes
SHA-256: 63c6ac24e9ed03ca0f25f2e167477fa2409cd3e82d7525733542ae569ef6d08c

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