Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e415e84c33661d…

MALICIOUS

PDF

68.4 KB Created: 2021-01-31 10:04:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 155a09e563dc16366b9e154bf658ca01 SHA-1: df8ba56f6c7064a2f73b0cca6546db3cd8d2a874 SHA-256: a6e415e84c33661d1629b82f8605749f3b343cb2f681d0ac6659459624d6167e
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/wb?keyword=flick%20kick%20goalkeeper%20mod In PDF document text
    • https://cdn.sqhk.co/ributexovek/hfVeLgi/zombie_assault_sniper_hack_version_download.pdfIn PDF document text
    • https://nubipudovolena.weebly.com/uploads/1/3/4/0/134012318/bibubiwepelu.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/Yhajjhh/jogedekaxonagafimofe.pdfIn PDF document text
    • https://biligimanud.weebly.com/uploads/1/3/1/4/131454089/dafcb5e.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/4phig28/savoduzabedejerupibapetem.pdfIn PDF document text
    • https://zupuluduwiwafop.weebly.com/uploads/1/3/2/6/132681460/3187490.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498978/normal_5fdf9796a25e8.pdfIn PDF document text
    • https://xidelesa.weebly.com/uploads/1/3/4/4/134498911/6785580.pdfIn PDF document text
    • https://waxizeno.weebly.com/uploads/1/3/0/8/130814339/495374.pdfIn PDF document text
    • https://cdn.sqhk.co/papusabefo/jgDSiax/44362511378.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/V6RtTaO/38191757481.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://newewixojarulup.epizy.com/boult_tru5ive_user_manual.pdfIn PDF document text
    • http://sofidusujewa.epizy.com/free_templates_for_bachelorette_party_invitations.pdfIn PDF document text
    • http://xexelakufakeze.epizy.com/62516353760.pdfIn PDF document text
    • http://dulaxidej.epizy.com/73504030309.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_off0000ca98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA98 5232 bytes
SHA-256: b99804b9690ff485c87dc4c2df1749d5a1039c17b7b9bd6dac6cdabf6164e489
font_01_sfnt_off0000dc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC58 11444 bytes
SHA-256: 240f3639e6a4366945cc14ca781af4f5746db08edd2cb867d4ec84a0d52127cb

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