Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1f809ac11857daf…

MALICIOUS

PDF

42.0 KB Created: 2021-05-16 00:04:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a11349928ae8baa9715d99e1cce93e85 SHA-1: 1aa8421407479174dee841a3a548a5ca052dcfae SHA-256: a1f809ac11857dafbb236c553f4b8aa484be226ba57720356688e0a867a19031
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 0.9971

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 https://netcdn.xyz/app/479516143/free-minecraft-realms-to-join-game-hack PDF link annotation
    • http://www.ma-plast.hr/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.ma-plast.hr/files/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/websites-for-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
stream_003_off00004b00.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B00 24312 bytes
SHA-256: 138e74f72c82b1c77a0438cc331928816a5dfa32496e1ac09bbf88b18d56c765
font_01_sfnt_off00008268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8268 18208 bytes
SHA-256: 07ea4a0a65e268d617c6aeb2efc29ec1284b659111274d24dd89fc4161b37103