Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35076e16f689ac1…

MALICIOUS

PDF

70.3 KB Created: 2021-02-17 02:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0f695fdb37b98a66233dbdd6827d8b9a SHA-1: ed4ff4e0b70bdf9c0624993a59319e1c9810b5fb SHA-256: c35076e16f689ac10b00e6bab0e300b55c46b1ecaa59b0cdf6c99f52506272c3
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/aws?utm_term=aprilaire+800+cost+to+operate In PDF document text
    • https://cdn.sqhk.co/lepavenujal/gjgjehg/vizowu.pdfIn PDF document text
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/774335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475864/normal_60211095b00fc.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/0KbXifx/pusenetozo.pdfIn PDF document text
    • https://lovefuzabuzonif.weebly.com/uploads/1/3/4/1/134109130/6452999.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/cUjWzst/swot_analysis_in_healthcare_strategic_planning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5fd6176f9c6d5.pdfIn PDF document text
    • http://saxefitipar.iblogger.org/defogikofobimogidogusuk.pdfIn PDF document text
    • http://mmmmmme.space/reflection_of_my_life_free_sheet_music54q6r.pdfIn PDF document text
    • https://zokejiwiperasuk.weebly.com/uploads/1/3/4/6/134668939/5094864.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423780/normal_5feba29854cc8.pdfIn PDF document text
    • https://mezemefi.weebly.com/uploads/1/3/1/3/131384279/gazilevo.pdfIn PDF document text
    • https://cdn.sqhk.co/xizowabik/qiaujaf/ruvojojobimogoxesapoloj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://remabinamuv.rf.gd/86879229887.pdfIn PDF document text
    • http://xibupafuvobiluk.rf.gd/moloso.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_off0000d4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A8 5252 bytes
SHA-256: ce628d163e54390f205823ed609836f9d32857bb934ac5476690dc0e79bf1fdb
font_01_sfnt_off0000e68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68C 11196 bytes
SHA-256: 77732d2dc5d903a891c63f6a01b44f732a8c6185250075fe3ef695d92263efa9

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