Malicious PDF — malware analysis report

Static analysis result for SHA-256 319aa922d2562ee0…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 19:39:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1821505ebe5db57825d81362e22634df SHA-1: 8107ae0954e5a3fbd2a870b2e95b801831ac9e9d SHA-256: 319aa922d2562ee0b7e2906ea2109e56b3722f89a6c80e2c58aabc0c6269a07b
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/431946152/free-robux-no-verification-2021-ios-game-hack PDF link annotation
    • http://sttlets.education/senayan//repository/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/generate-free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-hack-robux-with-robux-generator_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-lumbertycoon-2-grief-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/invincibility-hack-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-cheats-2021-dll_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-hack-admin-commands-on-roblox-android_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-money-in-roblox-bloxburg-cheat-engine_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-make-a-badge-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-free-purple-items-on-billionaire-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-hack-free-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-red-spikey-hair-roblox-that-is-actually-free_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/do-roblox-employees-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/google-how-do-you-get-robux_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_off00002fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD3 21900 bytes
SHA-256: 3abe210940a18a360c33011d031c595b8cf053e8e36b184db93163be4fe6448e
font_01_sfnt_off00005ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF0 19476 bytes
SHA-256: 9fe1ea1c86177197d61ed707d4c4071d93c63f21ffdcda5dbf12cc87dcc1e4af

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