Malicious PDF — malware analysis report

Static analysis result for SHA-256 317634ca4ae3fd27…

MALICIOUS

PDF

33.1 KB Created: 2021-07-05 14:59:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1bad2a15af59dd9c6ca469ab5ca29a96 SHA-1: dcd8b01341230a5c833bf3ec70cce1706aa9268b SHA-256: 317634ca4ae3fd273462d61d4ba6bd038579c9586900026ef7cb5b303cec8399
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.tw/app/431946152/roblox-space-outpost-tycoon-script-hack-2021-game-hack PDF link annotation
    • http://lib.uho.ac.id/library//repository/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hack-roblox-account-kali-linux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/mcpe-hacks_GM479516143.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
font_00_sfnt_off00002a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A48 21864 bytes
SHA-256: cd29ade566334ffb6b6b2fefc99f5955316f7261f562c4ad6385c68d62e97d6b
font_01_sfnt_off00005a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A41 19780 bytes
SHA-256: 751f31815daadbe6f6d4568aa86fce51d15b97658432c792bb9026666671dade

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