Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0255f1aa9df0867…

MALICIOUS

PDF

76.3 KB Created: 2021-03-16 19:32:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 977fca37147070199dd7460c82f428a1 SHA-1: 7aa4d50630ebc661632fafecc390b9700b392ada SHA-256: f0255f1aa9df086762dd1a819ff040f4b24d1c9889d6fb0ab32a2a336205b36b
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'ponafet.ru', which is likely used to redirect the user to a phishing or malware distribution site. The presence of an external URI and the ML classification strongly suggest this PDF is part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/123?utm_term=format+code+javascript
    • https://static.s123-cdn-static.com/uploads/4461245/normal_5fe2f822eea2d.pdf
    • http://bajifepeselok.sportsontheweb.net/sesabezawawazit.pdf
    • http://ital-tess.space/setodamovafewututogjye9b.pdf
    • https://cdn.sqhk.co/xotalawad/ZUiaFDi/68192578659.pdf
    • http://lnstagram-helps-contact.com/download_spotify_premium_free_ios4dzs9.pdf
    • https://lobusuzagoti.weebly.com/uploads/1/3/4/4/134470260/874eb9959c.pdf
    • https://cdn.sqhk.co/folikulezig/NFnVhe2/greetings_and_courtesy_expressions_worksheets.pdf
    • https://cdn.sqhk.co/diwiporeb/sghznRG/dalesavuwazokujibulevo.pdf
    • https://cdn.sqhk.co/daruluneti/D1jaicY/golf_clash_cheat_shots_android.pdf
    • https://static.s123-cdn-static.com/uploads/4384029/normal_5ff8b5230a314.pdf
    • https://static.s123-cdn-static.com/uploads/4454055/normal_5fc8c2fea0493.pdf
    • https://vafomelopujoxo.weebly.com/uploads/1/3/4/8/134864043/c156ecffc763.pdf
    • https://xopugexufejan.weebly.com/uploads/1/3/4/7/134709921/7957857.pdf
    • https://terigemi.weebly.com/uploads/1/3/1/8/131856376/6996086.pdf
    • https://static.s123-cdn-static.com/uploads/4403954/normal_5ff6042b731d2.pdf
    • https://static.s123-cdn-static.com/uploads/4367680/normal_5feec7ac8b9d4.pdf
    • http://risonubokedoxav.scienceontheweb.net/houses_of_the_holy_album_cover_art.pdf
    • http://golomashvanna.xyz/17779362325atp7h.pdf
    • https://static.s123-cdn-static.com/uploads/4386347/normal_6003cf5f3da64.pdf
    • http://swiss-gear.store/little_red_riding_hood_story_worksheetzg5dy.pdf
    • http://betijeduw.getenjoyment.net/python_projects_for_practice_github.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kipejefanowisu.atwebpages.com/90541265797.pdf
    • http://supuwevul.atwebpages.com/89906254310.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_off0000ec80.bin
8aae1d4157eadd5d96f95839c05251168c070f8774c39e479d180d6bc9ce3d1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 5276 bytes
font_01_sfnt_off0000fe64.bin
4e37dd60a5b258c8ec6e14a4933ac675887559a314c3666ae6ba889aa0441ee3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE64 11164 bytes

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