Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd8a2d908c72a4e…

MALICIOUS

PDF

83.6 KB Created: 2021-02-02 23:48:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d588d5016ab2e2fd4b8bffd01dd882c9 SHA-1: 3cf25f4cc06db0790131c6e3e5752761ed7112c7 SHA-256: cbd8a2d908c72a4ec2b1acc2d4c978348dc090a98f04e87025bce5edfaf1f7f9
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://yafferge.ru/wb?keyword=linen%20sheets%20clearance In PDF document text
    • https://xuxewisi.weebly.com/uploads/1/3/4/2/134235501/2222419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_600cfd18a6eb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480756/normal_60175cc4746c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452835/normal_5feba814535ac.pdfIn PDF document text
    • https://jibunomo.weebly.com/uploads/1/3/5/3/135348462/1cd5365.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420448/normal_60026258c245b.pdfIn PDF document text
    • https://tabivivefevevu.weebly.com/uploads/1/3/4/8/134889686/c0f1086c9c.pdfIn PDF document text
    • https://dokegofixak.weebly.com/uploads/1/3/0/8/130873830/xiwuvozav-melulubiruru-roxusibufodivuz.pdfIn PDF document text
    • https://jorikumovitakus.weebly.com/uploads/1/3/4/8/134883246/8162453.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485457/normal_5fced6fb2cddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_600c9ae423079.pdfIn PDF document text
    • https://sekekipozikevaw.weebly.com/uploads/1/3/3/9/133997985/vobamobosipeketinesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405420/normal_5fd3691daf12a.pdfIn PDF document text
    • http://wiinorama.fun/la_belle_au_bois_dormant_conte3dpnv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422137/normal_5ff54a473613f.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_off00010b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B34 4828 bytes
SHA-256: ed590627c526297bfb9652123e054246aeba02157162f73b1cfc31c5747da013
font_01_sfnt_off00011b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9B 11284 bytes
SHA-256: c772dcfa11cfe6aaae51d42742117d16ed3945f027680712028f9fc2880a1bdc