Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf141dfcf56abb46…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 01:10:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a0314c94873287208c9da74b6b81db74 SHA-1: bcdff37345bc08870eee58a52a5c7b526521c093 SHA-256: cf141dfcf56abb46bb1709d8f0f8d99e3327566d3c973bffaa4c592a99bb6b46
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free spins, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and the embedded URL is associated with a game hack redirector. No scripts were extracted, but the document's content and heuristics indicate a phishing or scam attempt.

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/coin-master-heaven-daily-free-spins-link-today-game-hack PDF link annotation
    • http://elib.upiyptk.ac.id/opac//repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/pubg-uc-redeem-code-today_GM1330123889.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/jailbreak-roblox-free-money-generator_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-roblox-card-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/dailyrobux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-hack-tycoon-simulator_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/apocalypse-rising-roblox-hack-script_GM431946152.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_off00002fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA2 22292 bytes
SHA-256: 7bf3b292690988b170110f001add7ec8eb2e49ecd2f28309b06f5e9c934eb090
font_01_sfnt_off000060da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DA 19056 bytes
SHA-256: 324e96efcac94ef4e9c0abe4aaccfd01011b6e5aa549f18ade16f03112fd33a6

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