Malicious PDF — malware analysis report

Static analysis result for SHA-256 a99de1076dfce1b3…

MALICIOUS

PDF

35.1 KB Created: 2021-06-28 01:48:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bf1f7d001a7627acc53b81a2d29a9ca7 SHA-1: 8dfb0127f9cfd95ab37ce474b1dbf0025f70a2b8 SHA-256: a99de1076dfce1b30c3cd9314e47f3e34a4d10b83d508d5302a57dd0c6441e2d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of game hacks and free currency to trick users into visiting malicious URLs. The embedded URLs, such as http://netcdn.co/app/431946152/ultimate-driving-delancy-gorge-roblox-money-hack-game-hack, likely lead to malware downloads or phishing sites. The ML classifier strongly supports the malicious nature of this PDF.

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/ultimate-driving-delancy-gorge-roblox-money-hack-game-hack PDF link annotation
    • https://www.advancissurgical.com/uploads/files/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-models-into-roblox-t-shirts_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/hackers-that-hack-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-roblox-hack-accounts_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/dailyrobux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/hacks-for-free-animations-roblox-proof_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-robux-hack-november-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/earn-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-godly-roblox-mm2-new_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_off00002fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC1 22628 bytes
SHA-256: 15cb3e7460447fb63b2e1a665a172144507f8257a8a7fadb3718b2554d78a36f
font_01_sfnt_off000061f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F8 19796 bytes
SHA-256: 5aa2fe62b113c871d8f09396f27b8da2c8009cb014b3eb746d95b939eaa136f7

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