Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f44f9b29f392f7…

MALICIOUS

PDF

78.4 KB Created: 2021-04-02 09:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5ecff32229261345c7d0dc28480f139 SHA-1: b960dd2d0daae27503ccc303aa0102f748463532 SHA-256: f2f44f9b29f392f7496115c43cb39111ea1152f8fed4ca5c402125b307e5dfff
104 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL and the presence of a "download button" heuristic suggest a phishing or social engineering attack, likely aiming to trick the user into downloading a malicious application. The document body, though heavily obfuscated, contains references to 'kahoot hack apk android', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://midufefew.ru/wix?keyword=kahoot+hack+apk+android
    • https://cdn.sqhk.co/riwifesineji/cjibeiZ/town_farm_truck.pdf
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdf
    • https://static.s123-cdn-static.com/uploads/4477167/normal_5ff8448e7433c.pdf
    • https://cdn-cms.f-static.net/uploads/4480589/normal_60526ed3f3267.pdf
    • https://cdn.sqhk.co/buzovegom/jwLbjdh/trending_music_videos_on_instagram.pdf
    • https://cdn.sqhk.co/gobajejuz/j5AK6ih/baking_recipes_from_scratch.pdf
    • https://static.s123-cdn-static.com/uploads/4454056/normal_5ffe9fe55333b.pdf
    • https://cdn-cms.f-static.net/uploads/4466173/normal_6064c021f2699.pdf
    • https://cdn.sqhk.co/feletitami/jdhdhhe/17602323346.pdf
    • https://cdn.sqhk.co/gazegarov/GWgeKgf/devil_ninja_youtube.pdf
    • https://cdn-cms.f-static.net/uploads/4479710/normal_603c6edb99307.pdf
    • https://cdn.sqhk.co/xoberuweri/fgifdjU/xegagaji.pdf
    • https://cdn-cms.f-static.net/uploads/4479435/normal_6055ee0f61300.pdf
    • https://cdn-cms.f-static.net/uploads/4369936/normal_6012444d7566d.pdf
    • https://cdn-cms.f-static.net/uploads/4450641/normal_60562f1ce12b6.pdf
    • https://cdn.sqhk.co/jabuvilir/0jLggzA/rojumokuxupazi.pdf
    • https://static.s123-cdn-static.com/uploads/4419857/normal_5ffb0cab18696.pdf
    • https://cdn.sqhk.co/jixavome/HEajg6T/60339473988.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/begijufadi/27107620341.pdf
    • https://s3.amazonaws.com/xoguwavosuje/bootstrap_4_sidebar_menu_template.pdf
    • https://s3.amazonaws.com/zuxime/why_are_laws_necessary_in_society.pdf
    • https://s3.amazonaws.com/zafijukopa/68159529012.pdf
    • https://s3.amazonaws.com/bawalidamovidud/voting_list_up.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8bb.bin
8db9ef5ed747e8173065463c70afd0be7ff6b9d5d7b1a5d52dd31d6f4a43e79c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BB 4656 bytes
font_01_sfnt_off0000f86f.bin
30efd04b55cb4b109b142474e3721ccfd1c3e0ddda877e719b7e742409a9b550		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF86F 11108 bytes
font_02_sfnt_off00011e50.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E50 4324 bytes

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