Malicious PDF — malware analysis report

Static analysis result for SHA-256 607df88302ec1ba5…

MALICIOUS

PDF

33.1 KB Created: 2021-07-05 00:26:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 34d616478316a78ee3bd1316c3a236f3 SHA-1: 8f46786f43dd7f316ecea43baad9d5576b40daff SHA-256: 607df88302ec1ba52b5d62e1694ae9d722e07fc9c54d50123c7ee5ce8824795d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links and embedded text promoting 'free Robux' and game hacks, which is a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious. The document links to both a domain and an IP address, suggesting a distribution infrastructure for potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/earn-free-robux-today-game-hack PDF link annotation
    • http://103.40.122.33/akasia/repository/free-robux-no-verification-2021-ios_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/how-to-use-cheat-engine-63-on-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-apocalypse-rising-how-to-spawn-items-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-penguin-in-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/speed-hack-roblox-download-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-free-rs-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-please_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-cheats-without-builders-club_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-account-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-in-roblox-games_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hacker-day-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/break-free-roblox-music-id_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_off00002af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF0 22368 bytes
SHA-256: e01dadc4f9b35fbca76289d27088de929e65b05992555c0aa7c244796d603561
font_01_sfnt_off00005ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA4 19072 bytes
SHA-256: 82db6ce193e18a75fae7aab420d9e740a3b7c910ba2cb20ee9d5d98feb1db9a0

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