Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca8601d0031d1757…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 08:56:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b8d2ec79ce288d7b6b7341a708da23b3 SHA-1: d367387518f8998c9d5aa577af28f12599e37b4c SHA-256: ca8601d0031d175795e7a739606758be46ff18868b31cb019664d9c5ebf4f487
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 0.9980

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.tw/app/406889139/pop-slots-free-vegas-casino-slot-machine-game-coin-master-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-hack-tool-apk-download_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-livr-emerald-giveaways-roblox-direct_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/master-game_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/seven-v2-roblox-free-download-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/one-item-that-mskes-everything-in-catalog-free-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/is-minecraft-earth-free_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
stream_002_off00003396.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3396 22700 bytes
SHA-256: e9ad8013c3d11c06c686e062a88f5f70e40671856052746a8c44f66cfa113915
font_01_sfnt_off00006615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6615 18960 bytes
SHA-256: fcfab0c91ed1324c39762b25fc59b919b6ba18841eb4e4fccfc59f918c2483ed

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