Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4d9a641df399ed…

MALICIOUS

PDF

72.6 KB Created: 2021-02-12 23:37:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0a1bc24cf8daa34735e123eceb0a918b SHA-1: cbc4ff2e6c1db15d80240afe088dc3eda3845c85 SHA-256: db4d9a641df399ed59b10a0676d38d7e2ce3d4af704560fa8f6242c456f4c3a8
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=cool+math+games+gun+mayhem+2 In PDF document text
    • https://fabegobidik.weebly.com/uploads/1/3/1/4/131437275/zilotiguxebusiv_nufolitetujuk_welevibep_zatidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456389/normal_60135bc4d23b6.pdfIn PDF document text
    • http://giocodigital.fun/97496543203o7x0h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445731/normal_600363cbee1a9.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/iePhjig/mumesipafaled.pdfIn PDF document text
    • http://airbin.top/4528511751316tzb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5fe9ef1990a46.pdfIn PDF document text
    • https://cdn.sqhk.co/zisuxemop/icj9yPL/69470067149.pdfIn PDF document text
    • https://vorexumezekadan.weebly.com/uploads/1/3/0/9/130969740/mepifokek.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/4ja93mY/saxuzowidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5fd1708a56d75.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/jbgjJjb/51291568192.pdfIn PDF document text
    • https://nigikejogu.weebly.com/uploads/1/3/4/9/134902550/1c8570.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_601b8ed8dd3db.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/jitChbx/mezutugosokajexedatone.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/DTBhihg/top_crafting_games_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/wituruxa/frXL6gg/xikuxokomowu.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/hmAeFjt/dumusat.pdfIn PDF document text
    • https://cdn.sqhk.co/disanefamu/hgjcEij/super_cobra_jet.pdfIn PDF document text
    • http://specialsale.info/816934101137mpr4.pdfIn PDF document text
    • https://rejukikigukaw.weebly.com/uploads/1/3/5/3/135387704/nelevufipu.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_off0000ddce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCE 5140 bytes
SHA-256: 35c6177531f30e235ab4c0040f436c9d76b555ad2cc42012b9116bb49cbdeb74
font_01_sfnt_off0000ef27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF27 10968 bytes
SHA-256: b336b1ff52ccd6cb6ea6b0238d1e5e8ecbcf1da3457312c56ccc01312563737f