Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf58385fe98d12c2…

MALICIOUS

PDF

79.1 KB Created: 2021-05-03 20:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ce6f58e8c6619127fbf326c1c6394464 SHA-1: 13ccf2dcbd388cd64e8850ad7e3c1388429a7068 SHA-256: cf58385fe98d12c252deadd20fc4e60b455e28b7d6ab298de84a951b983329a8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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://seumenha.ru/strik?utm_term=who+makes+tappan+gas+ranges PDF link annotation
    • http://gokojemisivuf.22web.org/50691635966.pdfIn PDF document text
    • https://xasigusuvenazuj.weebly.com/uploads/1/3/0/7/130739755/3a99ccb7f8faff9.pdfIn PDF document text
    • http://xekaminam.22web.org/25372232662.pdfIn PDF document text
    • https://cdn.sqhk.co/pemazekefise/yjiXQii/xeduxo.pdfIn PDF document text
    • https://jonaditogun.weebly.com/uploads/1/3/1/4/131408899/todukil.pdfIn PDF document text
    • http://fusubakitakudup.66ghz.com/7913167049.pdfIn PDF document text
    • https://modulofironufi.weebly.com/uploads/1/3/4/4/134402713/2429282.pdfIn PDF document text
    • https://cdn.sqhk.co/fotajoge/Yjbgeji/fukexogafexetazeteviket.pdfIn PDF document text
    • https://gilemana.weebly.com/uploads/1/3/5/3/135319463/somugamizajedidafa.pdfIn PDF document text
    • https://cdn.sqhk.co/gezefesete/HjfheyW/bifevuxewuzalasejeje.pdfIn PDF document text
    • https://cdn.sqhk.co/ramawuvade/NAjS1ij/figilomoxugusudumixatuv.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/sawiv.pdfIn PDF document text
    • https://musonilemif.weebly.com/uploads/1/3/4/7/134752032/jerep_gawulupojuwonif.pdfIn PDF document text
    • https://cdn.sqhk.co/vidikusupegu/fgdYhgh/kagefeza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bezokavarakixe.epizy.com/gate_2020_notification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f3afd93-cbb8-433b-a436-3afaadd897db/rosario_de_la_misericordia_completo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ed1afe7-a67b-4b93-ac71-153501160108/98609326263.pdfIn PDF document text
    • http://jovozovoxisuno.epizy.com/99546531453.pdfIn PDF document text
    • http://bajewilogofiro.epizy.com/putin.pdfIn PDF document text
    • http://runisinifozi.rf.gd/approaches_and_methods.pdfIn PDF document text
    • http://fugewad.rf.gd/great_answers_to_tough_interview_questions_book.pdfIn PDF document text
    • http://vobixudijo.rf.gd/6044963503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e902bd-210c-4eca-b0ef-d9754189d380/top_10_projects_for_information_technology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d589f7e9-ee59-4128-b586-a4cf5f433900/can_echo_dot_connect_to_multiple_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4fc3e62-bcde-4930-a6f4-33a3b4a8c16b/74256078296.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_off0000f493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF493 5280 bytes
SHA-256: c1b66dd1c4efa586d0da502d871aef5886d1eaa11e8278ff005041ae0526776a
font_01_sfnt_off00010669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10669 12140 bytes
SHA-256: af7bfef40b6e2330a331e155b74ddefeeb157f6fac2c611ccbd1cb14c6a5aa8d

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