Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7c152af018ae73…

MALICIOUS

PDF

72.0 KB Created: 2021-02-28 05:38:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ea367bd1e0906de88cb9c82b1ee7dfae SHA-1: 4f14345418e9eb8185d6836acb7ca195ef7948ab SHA-256: 3f7c152af018ae73bcc0a28f5104e1135ff5fd3780ec217898d2915c023e1651
186 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
  • 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.
  • 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://nipisod.ru/wix?keyword=nonfiction+reading+test+carnivorous+plants+answers PDF link annotation
    • https://petabururumeje.weebly.com/uploads/1/3/4/9/134902787/wonesar.pdfIn PDF document text
    • https://cdn.sqhk.co/xoberuweri/ejehjQs/best_buy_store_brooklyn_ny.pdfIn PDF document text
    • https://cdn.sqhk.co/sepolulegaba/idiihcv/xidimesemupigike.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/hiiajis/mr_potato_head_school_rush_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473645/normal_60048e36e9fb4.pdfIn PDF document text
    • https://radumudoxelis.weebly.com/uploads/1/3/4/2/134235428/vapodojanafapuxafij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372967/normal_5fe0cff0e097c.pdfIn PDF document text
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/dc41d618d.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/wgdgdXL/78629474282.pdfIn PDF document text
    • https://cdn.sqhk.co/dilijenaka/EifKjfQ/64432387625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415055/normal_602d34fdd24bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5fe916011492d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_5fe7ed78e1555.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450418/normal_5fe411eade588.pdfIn PDF document text
    • https://boserizozililo.weebly.com/uploads/1/3/2/6/132682878/1985985.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482023/normal_5fc6c72c8f950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_60288e87cac14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448733/normal_5fec2ed57032f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juwebud.epizy.com/apex_release_dll_mafia_2.pdfIn PDF document text
    • http://lusiromipu.epizy.com/62459252507.pdfIn PDF document text
    • http://vizijikiwoler.rf.gd/47733262080.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD546 5444 bytes
SHA-256: 40f6b276495393a3cdb3915259ed946c3984374adde03a9439f68b00c09682bb
font_01_sfnt_off0000e7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F5 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000f082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF082 9712 bytes
SHA-256: 214f9948fbe5e441db4e33d1ad905b888f08d01c557b06409b6e84cae0baabea

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