Malicious PDF — malware analysis report

Static analysis result for SHA-256 437cc24c36944fcd…

MALICIOUS

PDF

71.4 KB Created: 2021-02-13 19:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e48ee9fbe668020e9821453a5b474c6f SHA-1: 32f326d4554c489912703519e151391a38d5d495 SHA-256: 437cc24c36944fcddadddeefe6e13a22da65cbd4196aefecfd776a3dc9c38551
184 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
  • 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 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=mini+istick+20w+manual In PDF document text
    • https://static.s123-cdn-static.com/uploads/4366015/normal_5fc850df7e175.pdfIn PDF document text
    • http://govnososal.xyz/98481462330cpjbn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379363/normal_5fe4ff872324c.pdfIn PDF document text
    • http://vezdesami.ru/misplaced_and_dangling_modifiers_worksheet_7th_grade3ux3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_601807fc5f09b.pdfIn PDF document text
    • http://interior.estate/472610613058iqxw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479710/normal_5fd6000335bc4.pdfIn PDF document text
    • http://digitaloffice24.ru/70077220606fsg6v.pdfIn PDF document text
    • http://idealicaufficiale.website/baines_high_school_uniformq2h15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392441/normal_601aecde29c08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410016/normal_5fe5317344406.pdfIn PDF document text
    • http://devgm.design/hands_on_machine_learning_for_algorithmic_trading_githubwmme9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dobejevilorizu.epizy.com/medicare_guidelines_for_axumin_pet_scan.pdfIn PDF document text
    • http://fosisoxefet.epizy.com/kanerezunelabanilefonomal.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_off0000db2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2C 5284 bytes
SHA-256: 7c089d4d06d09fd0492c68d66fd6ff83015e5ef16ae3601e1e7bdecd78c37e23
font_01_sfnt_off0000ed37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED37 10412 bytes
SHA-256: ddb8dfddd5175247c8e93fd029948c1aa69df95f837f13ec55481060922912de