Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7af57ba81a1b25…

MALICIOUS

PDF

36.7 KB Created: 2021-06-30 02:53:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0c88eb2d1658a3bc76d6e3167c1d2e40 SHA-1: d9a5b3b395a85d8bd5fab3927e311555fb8b3b33 SHA-256: ea7af57ba81a1b25c624c2df43fd3b67f885407308743b3528f4123ad91bbfaa
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks, specifically for Roblox, to entice users to click on embedded links. The primary link, http://netcdn.co/app/431946152/roblox-build-a-boat-for-treasure-hack-script-game-hack, is identified as a redirector. The ML classifier strongly indicates maliciousness, and the presence of external URIs and a game hack lure suggests the document is designed to lead users to a malicious site or download. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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 http://netcdn.co/app/431946152/roblox-build-a-boat-for-treasure-hack-script-game-hack PDF link annotation
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-robux-from-jailbreak_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/hack-nuevo-para-roblox-2021-btools_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-game-unlock-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-no-inspect-no-info_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-generator-that-really-works_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-hack-comment-avoir-de-largent-facilement-sur-jailbreak_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/hptts-webrobloxcom-games-2021202114-getrobustfreehere_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-murder-mystery-2-script-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-dragon-ball-online-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-knife-in-csgo-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-hack-roblox-with-cheat-engine-64-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/best-level-7-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-and-limiteds_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/get-roblox-items-free-chrome-addon_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-hack-peoples-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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
font_00_sfnt_off0000343b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x343B 23512 bytes
SHA-256: de62b0059fabb009becf217fda684492ca931132348fb32129c2ba6f78d5a2b2
font_01_sfnt_off00006910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6910 19536 bytes
SHA-256: fe731387af178baa413bf46dc946c6f2ede878685a4128b7eba245dcc7d6ff4f

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