Malicious PDF — malware analysis report

Static analysis result for SHA-256 618b12dddea2c71a…

MALICIOUS

PDF

34.6 KB Created: 2021-06-20 00:03:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a2d5aae3fe176ff033ddf7d0e21e993d SHA-1: 6dd2b4107bd55101e54c0e00b798cbc31ac6c24e SHA-256: 618b12dddea2c71a43b0f20f3cbcb0ff57bf25b2178031701530656c9b665f50
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.co/app/431946152/get-free-robux-gg-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-website-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-et-free-robux-april-2021-pc_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/rewardex-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/cheat-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/como-traspasar-paredes-en-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-phantom-forces-beta-hack_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/offers-for-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-project-pokemon-dll-hack_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-accounts-2021_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_off0000304a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304A 22580 bytes
SHA-256: 83bd668c875c91e2438209c304b539d18a514aff1000b5645f9cd50cd32881c8
font_01_sfnt_off000062c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C7 18820 bytes
SHA-256: 939eebabc2782028b138c731b49fe90b7b043b2dd7de89021f227a58667153f6

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