Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc834024e56cacf2…

MALICIOUS

PDF

69.9 KB Created: 2021-03-19 05:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 891a9da703c919419d46767870a33121 SHA-1: f83cac040141127aa1b540aea6ccf6953c8bd92a SHA-256: cc834024e56cacf2d31b3d614d567a7b9ab2c1d77fd4ade86beda860f2b5a48c
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a link farm designed to redirect users to external sites. The presence of numerous external URIs, including those hosted on disposable domains and potentially malicious-looking paths, strongly suggests an intent to facilitate phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jacksth.ru/wix?keyword=partners+in+faith PDF link annotation
    • https://cdn.sqhk.co/butiluluvuk/jC3HSgg/73846527846.pdfIn PDF document text
    • https://fopalese.weebly.com/uploads/1/3/5/3/135349797/mesipukixeni_denofovosedemuz_bejakotu.pdfIn PDF document text
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/todufupe_jezosi_wavekipori_dizopose.pdfIn PDF document text
    • https://cdn.sqhk.co/lexujowina/jhdjeje/resident_evil_8_vr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476954/normal_5fde60fb13657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_6023c7009810c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427300/normal_5fcc8df9c44d6.pdfIn PDF document text
    • https://gupexududoteg.weebly.com/uploads/1/3/5/3/135302954/5973532.pdfIn PDF document text
    • https://mupasifuv.weebly.com/uploads/1/3/2/6/132680827/xapebexubewisit_bajowedigufe_somarixekaver.pdfIn PDF document text
    • https://cdn.sqhk.co/jalotenabo/gfhdlji/whatsapp_set_wallpaper_per_chat.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/ivhdhic/wecommerce_holdings_ltd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_602796d83959f.pdfIn PDF document text
    • https://kerozuvesiduzam.weebly.com/uploads/1/3/4/3/134375161/lenevojikeniwe_bufizifeduji.pdfIn PDF document text
    • https://cdn.sqhk.co/mivuxakadu/JgcRgdh/kuzitibepog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481528/normal_5fde5da1c45d3.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwodemo/0jgOJgd/head_shaver_prank.pdfIn PDF document text
    • https://navanelesud.weebly.com/uploads/1/3/0/9/130969746/betitapamote.pdfIn PDF document text
    • https://kikitepolo.weebly.com/uploads/1/3/4/5/134514310/b076f5f9a4ba6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484154/normal_6036c982334e8.pdfIn PDF document text
    • https://cdn.sqhk.co/kegimovotol/ayuP7uH/xuwumomat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_60531dcfd1996.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448121/normal_5fcdcf047fe2a.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_off0000d3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F5 4824 bytes
SHA-256: ac95cb99eef573b9e9789d75c85054711c9f549b5ad444e0fa7d1a7353247b44
font_01_sfnt_off0000e455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE455 10804 bytes
SHA-256: a549ea26ac150b09974a8efb366598e8784fcfd0fd0dce5de5671674a63fbe5f