Malicious PDF — malware analysis report

Static analysis result for SHA-256 9602717cf22cb2df…

MALICIOUS

PDF

79.9 KB Created: 2021-04-29 02:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4508f232cc9cf01f24794d9511c3be1f SHA-1: c56cab3d45b331f7c726d3b23d34b6a6c6754176 SHA-256: 9602717cf22cb2df2c188e087c3484f078d0a7fb216821292c60b101dfaa3ed1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on directing users to 'mezovuduw.ru'. Heuristics indicate this PDF is a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/strik?utm_term=plato+the+apology+sparknotes PDF link annotation
    • https://cdn.sqhk.co/vakanaju/gjsHHjg/lip_art_3d_free.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/5942276544.pdfIn PDF document text
    • http://gafabotipunofu.mywebcommunity.org/business_case_study_analysis_sample.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502464/normal_5fee68ff54e9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464730/normal_5ff4d52562c2e.pdfIn PDF document text
    • https://xanuzejo.weebly.com/uploads/1/3/1/6/131637194/momujak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470836/normal_6052f01e9131c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478137/normal_606e40cf110ad.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/solar_system_worksheets_3rd_grade.pdfIn PDF document text
    • https://kasasifu.weebly.com/uploads/1/3/4/6/134697732/jumiximapaxave.pdfIn PDF document text
    • http://mivifukatovaga.getenjoyment.net/14101392059.pdfIn PDF document text
    • https://dugigoje.weebly.com/uploads/1/3/4/7/134754128/lajemomoxul.pdfIn PDF document text
    • https://cdn.sqhk.co/xijogedobu/igjfBih/christmas_nails_ideas_coffin.pdfIn PDF document text
    • https://monemoret.weebly.com/uploads/1/3/4/6/134667898/galuwowubuguvixafa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/53991604239.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/density_of_salt_water_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9c5839-59f7-4164-b084-f11bcea6c986/dyson_dc25_clogged_hose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13f19bf5-40ba-4b68-b1bd-4b6543f774f3/what_does_the_emoji_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/what_did_the_ending_of_big_little_lies_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/joxinopijaveza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2adf57a-be02-4a5e-98ce-3c44cbe07436/81721524820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61222ac6-178b-4ba6-9c76-b70c7be9ecae/what_is_the_best_nursing_drug_handbook.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_off0000f473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF473 5248 bytes
SHA-256: fb435568307e37eeb507e470d6ff0b646a6c53acd78444c797d70e20ed320685
font_01_sfnt_off00010650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10650 13448 bytes
SHA-256: 6f597b47a56fac54c36c4e14b2018024fbc151a7aa05ecdad55bcb33c19e02c2

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