Malicious PDF — malware analysis report

Static analysis result for SHA-256 b331b34242bc9f53…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 14:21:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d9d4e3dee74e063586332f31b312a1a8 SHA-1: 9c04431b305a52ff92a188f92edc8fe0b70a1ba4 SHA-256: b331b34242bc9f53321948f72655a1f9686033bdad6dd9461c41770baa1fb899
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 0.9864

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/431946152/games-to-get-free-robux-game-hack PDF link annotation
    • http://www.library.umbjm.ac.id/repository/coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-coin-master-credit_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005191.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5191 27340 bytes
SHA-256: 9d2142cac88cc7bb066636d4fb5581dea49cc4ac4347a063fd987203984a4486
font_01_sfnt_off00009084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9084 18608 bytes
SHA-256: 08e91301afb793f0c8f569168ad93911c90315771ef2b58170e32493949df7cc

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