Malicious PDF — malware analysis report

Static analysis result for SHA-256 b997deff340f330f…

MALICIOUS

PDF

36.2 KB Created: 2021-06-28 04:01:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3be5d84c2f10d6bbaf5f7f1068ed06fd SHA-1: cd1870e4f4cf464e43b57c43ee31bd6effe63d2f SHA-256: b997deff340f330fda7de142db26efbdf79026efdd04171bced505468075194c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs that promise free in-game currency and hacks for popular games like Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates that these links are designed to redirect users to malicious sites or download further malware. The ML classifier also flagged this PDF as malicious with high confidence.

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.co/app/431946152/how-to-get-free-robux-without-doing-a-survey-game-hack PDF link annotation
    • http://glll.de/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://glll.de/images/get-free-robux-please_GM431946152.pdfIn PDF document text
    • http://glll.de/images/how-to-download-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://glll.de/images/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://glll.de/images/roblox-hack-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://glll.de/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-roblox-blue-hair-com_GM431946152.pdfIn PDF document text
    • http://glll.de/images/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://glll.de/images/get-free-robux-now-free-robux-generator-com_GM431946152.pdfIn PDF document text
    • http://glll.de/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://glll.de/images/hack-roblox-powers_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-robux-hack-builders-club_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-robux-ninja_GM431946152.pdfIn PDF document text
    • http://glll.de/images/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://glll.de/images/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-roblox-accounts-20212021_GM431946152.pdfIn PDF document text
    • http://glll.de/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://glll.de/images/minecraft-launcher-free_GM479516143.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_off00003192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3192 23244 bytes
SHA-256: 50f98f7f77f6bc8b3568c3f37d8a8e14333540947220277e503a3c4d225503b7
font_01_sfnt_off000065da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DA 19932 bytes
SHA-256: f4d6b41eb19548078f8a74f128ce0c07c01507155e20afafc81de6f537c6a502

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