Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf19a5caa228ab41…

MALICIOUS

PDF

33.9 KB Created: 2021-06-18 14:35:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a0d600a866d75f3f34ee1ad925d4ce99 SHA-1: 43d920aa4f7c1cf397e9c58717eb82ac6711fb6b SHA-256: cf19a5caa228ab419c4a77a2289156eda34a8f9f3fdcffbd69545c833b008c98
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to game hacks and free currency for games like Roblox and Minecraft. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous related URLs strongly indicate a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/hack-roblox-ipod-game-hack PDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/blox-land-free-robux_GM431946152.pdfPDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/comment-hacker-roblox-android_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021-windows-10_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/bypassed-roblox-t-shirts-free_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/hacking-code-text-chat-roblox_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/demon-roblox_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-free-robux-no-waiting-2021_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/can-you-make-free-clothes-on-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_off00002da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA0 22256 bytes
SHA-256: a046de40a5ecf62f8652594ad563aeba01c137010375d8b2a4abbbf53816cf6b
font_01_sfnt_off00005f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F32 19008 bytes
SHA-256: 7570f1ec83e68a16736e53dca57746d73a9d01c08a1ffbbd9622342960da103d

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