Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d45ceb199988db…

MALICIOUS

PDF

71.5 KB Created: 2021-02-27 23:00:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c3de2d4d6a3fca7edfb309a9f2fb86fc SHA-1: 77f044631cb84b8054ebc192c8bd09a82b1e1bf3 SHA-256: 08d45ceb199988dbed5aa227dbc22f7afae99a9f1e27abab3730c0fe816bfac4
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/award?keyword=brother+hl2240d+driver+download In PDF document text
    • https://cdn.sqhk.co/depivuni/ji9xGhj/vatuserotaje.pdfIn PDF document text
    • https://degezumibupupek.weebly.com/uploads/1/3/4/8/134862322/rerekufisuxijep-pinisumadimevez-simezivebatibo.pdfIn PDF document text
    • https://cdn.sqhk.co/nivurerazusa/0ARjjhg/mimezox.pdfIn PDF document text
    • http://sesulede.iblogger.org/confirming_an_appointment_email_template.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/f8ZcijG/caregivers_for_seniors_ocala_fl.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/ighhbjc/wanderer_of_lifetimes_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/tejusukaxajo/fIggPKo/r_type_final_ps2_ebay.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/handbook_of_linear_partial_differential_equations_for_engineers_and_scientists.pdfIn PDF document text
    • https://cdn.sqhk.co/moxoxitij/eicmAjg/rebalenu.pdfIn PDF document text
    • http://vigopokis.iblogger.org/xozapiwinusomakaxosir.pdfIn PDF document text
    • http://gulexamotapa.iblogger.org/69645035913.pdfIn PDF document text
    • https://xaredeni.weebly.com/uploads/1/3/1/8/131871979/2755359.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/96108124606.pdfIn PDF document text
    • https://befewegumezozem.weebly.com/uploads/1/3/1/4/131453636/f5c506ca4cae.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/gvjfPiN/interesting_facts_about_human_body_quiz.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_off0000db27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB27 5300 bytes
SHA-256: bcf664c6811378c89938a17be9b4d96897467f7a8f01c1f12da4caf59359fafc
font_01_sfnt_off0000ed3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3E 10608 bytes
SHA-256: 8415d7c1103778438fb335d0e15baa4715928f965068c3a9293a42f49c11e8d8

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