Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a61b14173b9b46…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 22:53:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9eccee885a648c2110a9988d054a231d SHA-1: 7630f60abe666ebcc701257deeb37999fa5f17c0 SHA-256: e4a61b14173b9b4674440e1ec23e87f17fd42a04ec7e30c0e83bdaf2bc189ba0
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.tw/app/406889139/free-spins-coin-master-links-blogger-game-hack PDF link annotation
    • http://perpus.stfm.ac.id/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/top-5-free-skip-animation-games-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-trade-free_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-builders-club-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-free-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-lua-exploit-roblox_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_002_off00002fa7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FA7 22972 bytes
SHA-256: ab6bbc8dca797d5dc2248219bc0ef48f8ec9d4189950f2c572ac2ddad082a8a8
font_01_sfnt_off00006346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6346 18632 bytes
SHA-256: 3bd5d70d92567c4e9fdab6ab0c4abb83fff73585d00d870a94bf54a7db3788b5

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