Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9b3bafa5f96a79…

MALICIOUS

PDF

35.4 KB Created: 2021-07-09 08:56:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cbccc529981fe80901985175a60e321c SHA-1: 865c2cb5186a73d2d75a6e67f52cdbe5d1851db0 SHA-256: bb9b3bafa5f96a798c1a1ad27b97a2962f6e08aeb9fa4db668eb734d1d28ce02
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/431946152/free-robux-2021-no-human-verification-game-hack PDF link annotation
    • http://zagorjeadventureteam.hr/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/dbor-roblox-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/ww-robux_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/how-to-get-free-robux-in-two-minutes_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/roblox-free-pokemon-go_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/appbounty-hack-robux_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/how-to-get-free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/descargar-superspeed-hack-roblox-deathrun_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/roblox-playset-for-free-shirts_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/where-to-get-free-robux_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_off0000315d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315D 22348 bytes
SHA-256: acb0ec6c8b991f1ca7689702067063d6af73beb8d68a334765d8f1eb57b4b777
font_01_sfnt_off0000632c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 19736 bytes
SHA-256: 415a8643b263bdb8a5e4ae51f1e0119ae52f9187a77a7c28158d674e6dc65c25

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