Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb994c4d82e9905…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 07:02:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4598a3a9ee8e5a1dd0feaa7309f1839a SHA-1: 60afc4b31b79e095efc9382b06f2d791599a0984 SHA-256: 2bb994c4d82e9905d7f2f57647cb058ec95c7c63b45b4b50139666679a2feddd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to a malicious domain, masquerading as a "free generator / game hack". The ML classifier strongly indicated maliciousness, and the embedded URLs are associated with known malicious redirector infrastructure. The document body, though partially corrupted, contains text and URLs consistent with a lure for game-related cheats or currency, aiming to trick users into visiting the malicious site.

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/406889139/install-free-game-coin-master-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-robux-page_GM431946152.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_off00004f62.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F62 27812 bytes
SHA-256: af8fdc33d1894854e521978dd14ff63d362526605d55d83c9271296797ae77ec
font_01_sfnt_off00008df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF9 2812 bytes
SHA-256: 869414959d7b492e0f799b560e1731e3ab498bd286c28e9f0d2ec33d9b6cf53d
font_02_sfnt_off00009797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9797 18044 bytes
SHA-256: 3cafdf99dccc4afa1deecf758d28f342e02167b9bdac520f5cdfda0d1041b97c

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