Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3c304a173fd762…

MALICIOUS

PDF

46.0 KB Created: 2021-06-10 22:23:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 26f91a6712d0875716b11b1ac0bd201b SHA-1: 2e6b75e64ef694b5adb3a2054f937dc3b96d46cc SHA-256: 8f3c304a173fd762c9493ad511b9e4d2b3c56bd4e5cfd68b9c266bd0639480e6
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a heuristic firing for PDF_URI, indicating an attempt to direct users to external content. The document body, though heavily obfuscated, suggests a lure related to game cheats or hacks. The presence of a download button lure and the ML classifier's high confidence score further support a malicious intent, likely to deliver a secondary payload or lead to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • 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://netcdn.tw/app/431946152/roblox-cheat-enginefly-hack-game-hack PDF link annotation
    • http://pustaka.industri.ft.unand.ac.id/repository/roblox-work-at-a-pizza-place-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-roblox-accounts-with-robux-no-pin_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/cheats-on-natural-disaster-survival-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-money-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/hack-jailbreak-roblox-2021-kranberrye_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/how-to-hack-money-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/robux-hack-no-download-no-survey-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/how-to-get-free-robux-without-builders-club_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53B8 25644 bytes
SHA-256: 185c876bf90d1a8c25188304eb4a9921886dc9da7fc4bd9de4e9c63da8761ce8
font_01_sfnt_off00008f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F10 19040 bytes
SHA-256: f0548d22d818b703c3c1c0ca8b8c93c37cb8554461cb196d961716e4b3c43f4e

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