Malicious PDF — malware analysis report

Static analysis result for SHA-256 be898affccb6adb5…

MALICIOUS

PDF

34.2 KB Created: 2021-07-07 23:40:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7ee85f92e8413269ba722a006ca0dd0d SHA-1: 0cbabfbfc79e8c2273697a5e266a6f81ffc333b4 SHA-256: be898affccb6adb52116c36be4dbd18e295a267f9e6104a4b069e247ead9da8e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a call-to-action phrase, luring users to click on links related to game hacks and free spins. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-spins-16-04-19-game-hack, is flagged as a game hack redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document's structure and content suggest it's a lure for phishing or malware distribution.

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-free-spins-16-04-19-game-hack PDF link annotation
    • http://stitqi.ac.id/website/repository/www-robux-com_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-insta-arrest-hack-jailbreak_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coins-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/tiktok-free-promotion_GM835599320.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-robux-no-survey-android_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/download-roblox-for-free-on-android_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_off00003000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3000 22096 bytes
SHA-256: 086da0366746b0af5777e3cc246da729bc2b2ad5ff2aecaeb1074c001508afe9
font_01_sfnt_off00006117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6117 18844 bytes
SHA-256: 20d685e0a92dd782921121427ed45c9953f8581c82f4618ea276feb861e76f68

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