Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51f77162e79370c…

MALICIOUS

PDF

33.9 KB Created: 2021-06-30 23:52:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 18721b44a7cf561ca8684e60a5f4727b SHA-1: d07c1b98f3ede0fe3527264738a1f14d10fc9b68 SHA-256: b51f77162e79370c0866c8b5382433d92a08d30ccbbdc3b32c5f118ae2d4f2f1
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.co/app/431946152/free-robux-grould-game-hack PDF link annotation
    • http://apotema.com.co/ufiles/files/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-800-robux_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/roblox-shinobi-life-level-hack_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/white-t-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-come_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-hack-roblox-players-2021_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-get-free-robux-without-downloading-or-human-verification_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-4all_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-get-free-12-th-roblox_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-get-free-robux-no-inspect-may-2021_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/roblox-cheat-engine-mac_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-car-in-car-simulator-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
font_00_sfnt_off00002f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F51 21940 bytes
SHA-256: 2672c5095f3661c528fc15910789983a296139dc87538316275614c9527a23fa
font_01_sfnt_off00005fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAD 18964 bytes
SHA-256: bf5b628f714b7485b138e800deb05576ba343740f949a20d316231338a725abb

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