Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e65e3b6b832585b…

MALICIOUS

PDF

79.2 KB Created: 2021-03-17 19:00:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 59f39591b748f768b6c900474b31ab68 SHA-1: 20acea6a72217f9ac5303f43855cc99131f7e646 SHA-256: 9e65e3b6b832585bcf875c486a0d137d060e00d388b44a508a81889ba31bb1b4
186 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, containing numerous external links pointing to various domains. The presence of a high ML classifier score and ClamAV detection indicates malicious intent, likely for phishing or distributing further malware. The document's structure and embedded links suggest it is designed to lure users to external sites, potentially for credential harvesting or exploit delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=what+questions+are+asked+in+a+doll%2527s+house PDF link annotation
    • https://cdn.sqhk.co/laruxibut/igjeigZ/whatsapp_messenger_download_app_2020.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/6985313.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/maserati_granturismo_mc_coupe.pdfIn PDF document text
    • https://mejebogisoxofix.weebly.com/uploads/1/3/4/6/134606558/keseme_patukunoza_xixupowiku_fosuzuturo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_6030db2ad80cb.pdfIn PDF document text
    • http://votixibutiro.medianewsonline.com/jabibunabobulenobuga.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/hjrhjgc/biriwujusogumo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418166/normal_5fee7737d7445.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/how_to_draw_a_nose_step_by_step_for_beginners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470679/normal_601eb68f8710e.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipox/hhiDhhi/20983738951.pdfIn PDF document text
    • https://cdn.sqhk.co/xidafigutoxa/xHVgdIU/53480053215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_6051e5d887def.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_56b66b562573435fbe3159015119bbbc.pdf?index=trueIn PDF document text
    • http://fidikaxano.myartsonline.com/posalaxu.pdfIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_26d3459069f045748cb603c57008955c.pdf?index=trueIn PDF document text
    • http://sajomapujozokux.onlinewebshop.net/jadepuvuzizelawakiw.pdfIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_bf26238af8484f38937483a8f1d0bd55.pdf?index=trueIn PDF document text
    • https://ff87c8b5-ca28-4ac0-94ba-218234037d87.filesusr.com/ugd/1d4e4f_437a327c55354edb8e72420f983580ad.pdf?index=trueIn PDF document text
    • https://6bfd3344-23d3-4e03-ab7d-00c1c23eecf6.filesusr.com/ugd/be19e1_bbe7469d7b7d43308b8f51a4974b386a.pdf?index=trueIn PDF document text
    • https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_f47ad2814fc54b8a823f2a578a1294ca.pdf?index=trueIn 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_off0000f692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF692 5148 bytes
SHA-256: 35f4873c8565313ef83564a58d0339ccf45eca0125bdda5e5206562eb4b6cc62
font_01_sfnt_off00010820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10820 11520 bytes
SHA-256: 40a6d34e70e4c70d5093930710722b8c2d809f23b550ab15a511459edc8f295c