Malicious PDF — malware analysis report

Static analysis result for SHA-256 c206eeeaa915b717…

MALICIOUS

PDF

64.0 KB Created: 2021-03-29 20:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c3618052a8f33ee269cb660bc26a757 SHA-1: e53d01b2aa3f39978baec42674be93cdd188327b SHA-256: c206eeeaa915b717f4f306bb8e0df3be1eb0cd95b6bc18d3b91c36e7497260ff
124 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8273

Heuristics 4

  • 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
  • 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://jumiwimov.ru/award?keyword=appsc+aso+previous+papers+pdf
    • https://cdn-cms.f-static.net/uploads/4451205/normal_6054e93de3799.pdf
    • https://static.s123-cdn-static.com/uploads/4367301/normal_5ff88d87f2f72.pdf
    • https://sivabujik.weebly.com/uploads/1/3/4/0/134017760/puzoleresevevu.pdf
    • https://zejuwotozago.weebly.com/uploads/1/3/4/6/134647352/mavemedale-lamad.pdf
    • http://juwupexutaval.mywebcommunity.org/32137431450.pdf
    • http://bekopomulasebi.getenjoyment.net/internal_audit_manager_salary_australia.pdf
    • https://cdn.sqhk.co/sewadokoka/geieieP/happy_racers_game.pdf
    • https://cdn.sqhk.co/pagozixupezi/gc2QhbF/94964562255.pdf
    • https://rudanivaxaf.weebly.com/uploads/1/3/4/4/134497940/cf0a9951d0c220e.pdf
    • https://mumabawof.weebly.com/uploads/1/3/4/6/134634692/594f9bc.pdf
    • https://xatikofaf.weebly.com/uploads/1/3/0/8/130814669/fukageroletekifapa.pdf
    • https://fagadixiridare.weebly.com/uploads/1/3/5/3/135304990/nevonataxilewog.pdf
    • https://cdn-cms.f-static.net/uploads/4461201/normal_605327a62ea3a.pdf
    • https://cdn-cms.f-static.net/uploads/4378390/normal_60433c53e5c34.pdf
    • https://cdn.sqhk.co/fupokonabat/fijicjd/71722498794.pdf
    • https://cdn-cms.f-static.net/uploads/4409840/normal_604bbeb450cc9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/093fb215-0b1d-4542-919a-f64b2822e342/weber_spirit_e-310_classic_cover.pdf
    • https://uploads.strikinglycdn.com/files/5193cdc3-c6b1-4038-ac6d-0fdb4666cfeb/romuwofimexuxej.pdf
    • https://uploads.strikinglycdn.com/files/d81fde32-2cc5-4ae1-a556-ec71be13dbab/u_satyanarayana_biochemistry_book_free_download.pdf
    • https://uploads.strikinglycdn.com/files/ed03a1aa-39de-4200-bd71-93aced76ff7f/how_do_i_contact_pals_nhs.pdf
    • https://uploads.strikinglycdn.com/files/5d934410-9ce6-460a-a208-3ed9573fb554/dewalt_dw718_replacement_motor.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e46a.bin
7d0cddd925415b9d7a513aca052b1fd7d385143f4ff19129e51ae4450a1672b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 5168 bytes