Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30a32ec25ac6f4d…

MALICIOUS

PDF

43.8 KB Created: 2021-06-04 02:45:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bae40a141f3241ea643ae149e15c2c8b SHA-1: 9a0f07e686f9444fc3d0d7fe9be079d414ebb403 SHA-256: a30a32ec25ac6f4d2b802a712eb3a31afee08f1786613058ddb57f7ba32e21dd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9865

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.online/app/406889139/coin-master-free-codes-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/create-app-like-tiktok-free_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/tiktok-free-up-space_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_004_off000050e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E2 24800 bytes
SHA-256: 3982ec405825b8d5bde7ac9de8cec389cb02d69e17683346b330aa7355d7e1d2
font_01_sfnt_off000089c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C5 17884 bytes
SHA-256: dce98ab1a9f6331dfaabbdd57dacdba92c66b57249d10e9c2a1df39138c2a47b

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