Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50b8d876d25791f…

MALICIOUS

PDF

70.1 KB Created: 2021-02-15 19:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8c8d8e3677a0dc5e19e19289269ae122 SHA-1: 3ee84762b8fac284d912376d64d03dc7a08903e0 SHA-256: a50b8d876d25791fba633bb95b11861aaff9c94115a8da7b98cb3a135ebbc5a4
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=the+yuppie+handbook+pdf PDF link annotation
    • https://cdn.sqhk.co/jesotipo/sgigejj/patawanekutufote.pdfIn PDF document text
    • https://balevogikuvapij.weebly.com/uploads/1/3/5/3/135333961/7197133.pdfIn PDF document text
    • https://cdn.sqhk.co/gubogezemazo/jahgjgP/vintage_rocket_racer_toy.pdfIn PDF document text
    • https://subegudikowezi.weebly.com/uploads/1/3/4/4/134476363/bakirumame.pdfIn PDF document text
    • https://poxixarusel.weebly.com/uploads/1/3/4/1/134131789/rozepesom_tiresegiwuwas_vajuviged_gubujagipeboran.pdfIn PDF document text
    • https://cdn.sqhk.co/mavixuwaloz/chiMDLZ/75572359751.pdfIn PDF document text
    • http://smotrikino.fun/norividumetibifoduduvh9n6.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/dUWIibC/36664703636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408330/normal_6013300ea167b.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/a6ndegj/javanimifejopozizezeda.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/bzgjidL/upgrade_software_on_iphone_4s.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/jagesexedupokogebgf8.pdfIn PDF document text
    • http://yellownatural.space/34545232578onv56.pdfIn PDF document text
    • http://matcobzor.ru/30722247936cyh9k.pdfIn PDF document text
    • https://dapemoko.weebly.com/uploads/1/3/4/6/134647299/sovowu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/17815314172.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/tebejozegekej.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/raxowewuduxibipadize.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/15247856356.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_off0000d6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E9 5080 bytes
SHA-256: 61f0a5bd34a8d7836f657eb44295693157b492ddf0c6203fbd8e1f856e15e1b3
font_01_sfnt_off0000e83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83A 10348 bytes
SHA-256: c33bdd0f5672cfdc8a974f0579d5cad75761bd83cf526ba076734f66faffab1b

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