Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22702e88f291b4e…

MALICIOUS

PDF

75.9 KB Created: 2021-04-03 06:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6572112d51c633b9d6fa206260964a25 SHA-1: 269bdb9438333ab3a7d2931716dced39a55d874e SHA-256: c22702e88f291b4e3e6533c8fc90b1a211a6ff89291971d9b2ad2a8f26f8820e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a link farm, containing numerous external URLs pointing to various domains, many of which appear to be disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and extensive URL list suggest it's designed to redirect users to potentially harmful content.

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://druttle.ru/strik?utm_term=business+communication+today+book+pdf PDF link annotation
    • http://tcerkovniekupola.space/manual_gps_garmin_oregon_6508185n.pdfIn PDF document text
    • http://ponaxamewimenul.sportsontheweb.net/27182026106.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/fb230e6b5.pdfIn PDF document text
    • http://kiluzilaw.sportsontheweb.net/aruba_map_download.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/26324860443.pdfIn PDF document text
    • https://wuzinetasinozud.weebly.com/uploads/1/3/1/6/131606123/7ef35.pdfIn PDF document text
    • https://xerazagas.weebly.com/uploads/1/3/0/8/130813913/gelagiva.pdfIn PDF document text
    • http://kujamemapevubu.mypressonline.com/99692611114.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/dowipasf9z.pdfIn PDF document text
    • https://mibuvenatevuwo.weebly.com/uploads/1/3/4/6/134607329/jusosemuloxose.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/hdBWQjb/jelumonifafatuwewasoz.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/mubeg.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/U16igic/bus_simulator_ultimate_bilgisayara_nas_l_yuklenir.pdfIn PDF document text
    • https://vuxilimibipemop.weebly.com/uploads/1/3/1/4/131453056/dader.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_c48ff303fe1a43ddb8818bcd939529d8.pdf?index=trueIn PDF document text
    • https://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_e2a1c23deaf546b1911d8d497aaa87e8.pdf?index=trueIn PDF document text
    • http://ziwemasux.myartsonline.com/complementary_supplementary_vertical_adjacent_and_congruent_angles.pdfIn PDF document text
    • https://2cfcb734-ec62-4cd9-b61c-03d4762ad765.filesusr.com/ugd/a891c0_fa0098f236d4457e9e18f0742032207b.pdf?index=trueIn PDF document text
    • http://sodowurivav.onlinewebshop.net/46525554440.pdfIn PDF document text
    • http://paguxesij.myartsonline.com/dopugadatarevididuvaf.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_off0000ec81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC81 5528 bytes
SHA-256: 8c02dea3206406daca8918c260960eb0ccd251b4cbff3255345e72bb8ec59202
font_01_sfnt_off0000ff4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4E 10176 bytes
SHA-256: 7cf1f0eda68d96c81b7074d9b6eb66c0e95ad174387d4b49c2b993a5d8688ea2

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