Malicious PDF — malware analysis report

Static analysis result for SHA-256 24a50961ad035be0…

MALICIOUS

PDF

78.0 KB Created: 2021-03-18 16:09:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4ff337ca97b98bac1a324c2319f00ac SHA-1: 21a0168cccc2fb65e7162c07e51795490012f3ef SHA-256: 24a50961ad035be0e6cf1af8770fe7bb21e5cef445778f838bbb8f7b287d5fab
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be part of a lure, referencing 'refurbished smart tv best buy' in its query parameters. While no scripts were explicitly extracted, the nature of the detection and the embedded URL suggest a phishing attempt designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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=refurbished+smart+tv+best+buy
    • http://idealica-uficiale.website/43906650016hrq0p.pdf
    • http://eu-study.ru/zubapasijazsdwrz.pdf
    • http://kerosijuvibeg.scienceontheweb.net/wound_care_manual_malaysia.pdf
    • https://cdn-cms.f-static.net/uploads/4468812/normal_601fd2aea8abf.pdf
    • https://cdn-cms.f-static.net/uploads/4481408/normal_5fe621795ffa7.pdf
    • https://cdn-cms.f-static.net/uploads/4366987/normal_604cee92ae07b.pdf
    • https://cdn-cms.f-static.net/uploads/4426277/normal_60478ab26e20c.pdf
    • https://static.s123-cdn-static.com/uploads/4416501/normal_6005fa0eeb7a0.pdf
    • http://gafabotipunofu.mywebcommunity.org/64667968358.pdf
    • https://static.s123-cdn-static.com/uploads/4375518/normal_5fcb70652c7e6.pdf
    • http://flowerport.market/pozefifetogodubuparofe71vkb.pdf
    • http://usecabinets.xyz/canon_mp470_manualhfavq.pdf
    • http://top-salez.site/fda_establishment_inspection_reporth1y64.pdf
    • http://zikewexer.scienceontheweb.net/windows_command_prompt_basic_commands.pdf
    • http://cheapestshop.xyz/which_of_the_following_books_are_pauline_epistlesavrkj.pdf
    • http://hackins.site/which_bible_versions_are_catholicjbtny.pdf
    • http://vaxisezawoged.scienceontheweb.net/michael_vey_movie_where_to_watch.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://solarujarinobo.myartsonline.com/3d_to_step_online_free.pdf
    • http://sipanokule.onlinewebshop.net/kosutozevosexaru.pdf
    • http://lugifer.onlinewebshop.net/mn_drivers_license_veteran_status.pdf
    • http://dexadusoxeb.atwebpages.com/losajizaki.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1da.bin
991ee4f8c78d81caf5efe3ee0971901d46cc317903f8ebc1777d763d47406dde
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DA 5424 bytes
font_01_sfnt_off0001042f.bin
3d808a5f154486e0bdceba09a7306e4665408f75c140ac728e117b54bd5011a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1042F 10956 bytes