Malicious PDF — malware analysis report

Static analysis result for SHA-256 154c818b3946562b…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 15:38:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0be8ec2ddcca782d79656c62df91156c SHA-1: 4e466f75c092a1d7cd16f4d0b5a6d295d5a414f2 SHA-256: 154c818b3946562bcaa70a6aef4b1140ea2b90eab8edeac16f4d25052242b79f
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/www-robux-redeem-game-hack PDF link annotation
    • http://gts.edu.gh/library/repository/roblox-gui-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/dailyrobux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-braces-on-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-make-free-shirts-on-roblox-without-bc_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-script-for-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/yummers-free-robux-obby_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-menu-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/mega-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-builders-club-free-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-roblox-account-rich-ro-ghoul_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/robuxian-youtube-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-for-real-not-fake-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coins-coin-master-spins_GM406889139.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_off00002fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEF 22208 bytes
SHA-256: 795f3ef1716080625b9fe54472c2f6b7093bac9ffc7799b5dd3254bee4fb0aa7
font_01_sfnt_off00006126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6126 19348 bytes
SHA-256: e5280512b7610ecbe9f35059f51f4ace511a0f2c0ebbedb7d74ee2ccbb0f8402

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