Malicious PDF — malware analysis report

Static analysis result for SHA-256 898a887015e34a61…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 15:43:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7a1567bee9244e6c81423a071f7b2b16 SHA-1: 495569cb1f0ede2ee54809392505c8cc3a08ed9e SHA-256: 898a887015e34a617b903a848098faf9d8a080728d28a0d88f977581f07a032f
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/coin-master-free-spin-daily-bonus-game-hack PDF link annotation
    • https://library.univthamrinaka.com/repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/earn-free-robux-rbx-blaster_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-robuxs-games-no-scam_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-jailbreak-hack-download-2021_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/use-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-frappe-hacks_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-clone-cheat_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/the-free-prize-giveaway-obby-roblox_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/minecraft-esp_GM479516143.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-explorer-hack-script-pastebin-2021_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-hack-pastebin-2021_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/police-sym-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/10-free-spins-coin-master_GM406889139.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_off000031c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C0 22556 bytes
SHA-256: bce89d3e6eb2d03853973a7e7b665d1d0ae5473283eee2aa663975f88e7d44d8
font_01_sfnt_off00006439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6439 18952 bytes
SHA-256: d2ed054167ad71656c3df730ba14e02d9bf1f8c44d8566bad403600bb829d9f1

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