Malicious PDF — malware analysis report

Static analysis result for SHA-256 93961f5b4a6728e9…

MALICIOUS

PDF

34.7 KB Created: 2021-07-07 18:00:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c225f93ba114a2e3ba6099c628f8da27 SHA-1: 379278d698bcd4e13d00e58587d20e986bc65152 SHA-256: 93961f5b4a6728e93cd9a06030ad45ccc99fafbc3d48e677a3e8ba5450c82634
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/coin-master-free-coins-link-blogspot-game-hack PDF link annotation
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/cheats-for-roblox-on-phone_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/check-cashed-cheat-engine-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/promo-codes-for-free-stuff-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/bloxburg-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/ash-greninja-free-shopping-in-roblox-on-roblox-shopping-shirt_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-500-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-mod-apk-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/hack-roblox-steve-one-piece-roblox-auto-farm-chest_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-how-to-be-copletely-white-free_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_off00003122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3122 22732 bytes
SHA-256: 4658bf739895b76d7d3fed5897848602d554933e1c16cbb00fcd898ca8aa074e
font_01_sfnt_off000063f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F6 18632 bytes
SHA-256: d0d574b1662071f3403a16b1a6302b8c72ae4679adcfbefd57853cfc863fd1c5

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