Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c9d485b240d0bb…

MALICIOUS

PDF

47.6 KB Created: 2021-06-03 08:33:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 355e11b639c6b3b8a07a18e4fbe30258 SHA-1: 83edc8f4b7c9ad93aabf548c36dae68f698f39bd SHA-256: a8c9d485b240d0bbf0720bfecad925f80252547a9353e360fabfdcfefd5393cf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and sites offering game hacks and generators, such as 'minecraft-gun-games-free-game-hack'. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary goal appears to be directing users to potentially malicious websites, likely for further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.online/app/479516143/minecraft-gun-games-free-game-hack In PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/wurst-minecraft_GM479516143.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000554e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x554E 25320 bytes
SHA-256: 411c32dce7d581ebea97df4564f203f8d7c51183b946b56f322d53405bec2a02
font_01_sfnt_off00008e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E94 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off000098a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A4 17968 bytes
SHA-256: 8511888cd071b31a6773fc40a7c9fa25820a04ce1c2bff2e61827af067d413dd

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