Malicious PDF — malware analysis report

Static analysis result for SHA-256 413b5f8022ff0e24…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 16:44:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1208b4d49b90b33a5a28dd8d5435966a SHA-1: b5c394e4605ab75c6a8f9c13d72c8162cbcfc254 SHA-256: 413b5f8022ff0e243411e796c93d541e00e9bbc548ecb27497009ea8eb71f48d
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-cheats-without-verification-game-hack PDF link annotation
    • https://mbbs.hr/files/the-hacked-familys-basement-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-hack-com_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/hack-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-level-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/rbxboost-earn-free-roblox-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/robux-hack-giveaway_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/flee-the-facility-hack-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-unlimited-spins-and-coins-cheats_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_off00002f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2D 23036 bytes
SHA-256: 6793f1b8bc1a8f9bae0334495d2ca31daa8c128ecf0ee40e4a3f9a860691f2f6
font_01_sfnt_off000062c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C2 18472 bytes
SHA-256: 2357afe3a77e7c014e0703bcbd81075a5d1dab6d586aa1429deb4951cf781cee