Malicious PDF — malware analysis report

Static analysis result for SHA-256 b169e21b5bf4ab00…

MALICIOUS

PDF

47.2 KB Created: 2021-05-14 07:03:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 98be21b818af34ae25e5439bab2398e9 SHA-1: d5e0b383e02e501d05cda94a652fa4dd8b7433d4 SHA-256: b169e21b5bf4ab001bf0ec1eef4954714ea629766903b79b084ec83e49613150
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 0.8948

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/406889139/free-spins-and-coins-for-coin-master-game-game-hack PDF link annotation
    • https://privatearrangements.co.nz/public/files/game-toolbox_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/cm-daily-spins_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bcf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BCF 29092 bytes
SHA-256: 3a73cc8e242f73c4ebec24b0a01eda26936ec62eb29364b03b4f277a6f166399
font_01_sfnt_off00008c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C26 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9611 18320 bytes
SHA-256: d1cf6b486e789d6a7a281824944966070be141b92be060b449a52bae7023ebff