Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2183e7844ee63a2…

MALICIOUS

PDF

80.6 KB Created: 2021-03-27 20:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25a2b14ec42274212e6e2cec28693e02 SHA-1: de9aa138a55ba7ada309f779d2a0d998d9a7a5fc SHA-256: f2183e7844ee63a288b44642a8083d7250eb75d6dc9910920e0cd5a5afb5cb1f
116 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a phishing site, disguised as a summary of "The bloody chamber and other stories". The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of PRC/3D content and external URIs suggests potential exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://ponafet.ru/strik?utm_term=the+bloody+chamber+and+other+stories+summary
    • http://zomuregunaradu.iblogger.org/cspc_cisco_guide.pdf
    • http://lusolakidareve.mywebcommunity.org/xokagomapuxon.pdf
    • http://dipenoguzel.sportsontheweb.net/zagozojelaxebenigujabobad.pdf
    • https://cdn.sqhk.co/nokowifupe/hdmidBi/pigewi.pdf
    • https://static.s123-cdn-static.com/uploads/4388841/normal_6002a22f2fb42.pdf
    • https://cdn.sqhk.co/dijowasedop/SgeGQlm/jungle_castle_run_download.pdf
    • https://static.s123-cdn-static.com/uploads/4415077/normal_5fdcf79d36fc5.pdf
    • https://cdn.sqhk.co/lakivasulis/haghahm/setufepowikigelover.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_79391d1460fa4a7eae034ab8efe1b4bc.pdf?index=true
    • http://xabuvale.epizy.com/area_of_a_circle_worksheet_answer_key.pdf
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_b9edd53824dd48bfbde169ad4b3eb150.pdf?index=true
    • http://mewexudidis.epizy.com/vcruntime140._dll_rpcs3.pdf
    • http://dobupefibukin.epizy.com/platform_ajay_devgan_picture_movie.pdf
    • https://uploads.strikinglycdn.com/files/eaca8cb9-19e4-4ed9-b12b-e4077f0d9aeb/nuvajugejemisuj.pdf
    • https://uploads.strikinglycdn.com/files/baf927d9-d864-48fc-82de-47bc9b031d42/what_is_the_mood_of_the_mask_of_the_red_death.pdf
    • http://vobozezojip.onlinewebshop.net/east_asian_financial_crisis_1997.pdf
    • https://uploads.strikinglycdn.com/files/49c1047c-9127-4061-ad36-d6a2fe6c2b23/what_does_an_international_marketer_do.pdf
    • https://uploads.strikinglycdn.com/files/131c565f-49a6-4553-ad10-cadfdba474b2/are_all_boletus_mushrooms_edible.pdf
    • https://85377554-d84f-42a6-a955-c87f7d5d3d8c.filesusr.com/ugd/dd4472_46e1dd8227eb4c6a80589a74d7632fa5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5b2a45b2-e052-479d-b262-97f5c62fac43/fanifudor.pdf
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_fb72a485b1f64b60964947061301a552.pdf?index=true
    • 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_off0000fb63.bin
51b889bd458837e10aa3fb172314c99db7caf74ba046339652940c80c6d83b42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB63 5372 bytes
font_01_sfnt_off00010d79.bin
8ab4f77ad2a0d58ac74ed14711d7e259f02418629375ab4cdfc6fb9587802904		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D79 11088 bytes

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