Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ecd1f6cad8551e…

MALICIOUS

PDF

72.8 KB Created: 2021-02-18 11:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9a52381011b98f000808355a6bb5f9d6 SHA-1: efd85b2491243bfe07267bcafb3c2e8ace80374c SHA-256: c8ecd1f6cad8551eed0799cbc3be06ecd9fbd70020f812b4eb4bf32ac2581fc7
126 Risk Score

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://baarspo.ru/123?utm_term=information+retrieval+skills+definition PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393180/normal_5fe3fc01be7e5.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/ifBjjhd/92278362520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_5fdc4fc55ae93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411916/normal_6007cb346716c.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/F8ghMHl/1090549425.pdfIn PDF document text
    • http://tipografiyav.moscow/tennis_elbow_exercises0qegq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451049/normal_600fbba90969a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_601cda067f257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_5fe81245b7801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418370/normal_600c76ab49a97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_6025e3783ed98.pdfIn PDF document text
    • http://mon-compte-cmb.best/tikuzelojezrv9s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479684/normal_600154bb308d8.pdfIn PDF document text
    • https://cdn.sqhk.co/jalafimimodo/Yr1O9ch/27837442166.pdfIn PDF document text
    • http://train-home.ru/jizebikuzekumusasezcbhq3.pdfIn PDF document text
    • http://tovelksa.website/science_density_calculations_worksheet_answersvocbj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/sqlite_browser_android.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/abp_ananda_news_apps.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_off0000e398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE398 5112 bytes
SHA-256: 4ea2e1cab2bb4c293844c983f869d99d1cf58631d5aba1c7ba95b305bb0307cd
font_01_sfnt_off0000f4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EB 9740 bytes
SHA-256: ee7d7d33c375cea52a353f3ba6a427ea6b2bc07e49cb3172674b7f6f10b9d0c6