Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca1054f0a99be788…

MALICIOUS

PDF

35.2 KB Created: 2021-06-26 02:21:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c7d5881508eb13b62cbd5da63d993352 SHA-1: 30c2a4284daca1cf56b851c483f3a9477ac48665 SHA-256: ca1054f0a99be788fcc5840400f0ab4659bf5909f2e9cbe51489ed6f8a4576f7
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 are designed as lures for game hacks and generators, such as 'Roblox Free Model Roller Coaster'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this malicious intent. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves tricking the user into clicking these links, which likely leads to a second-stage download or phishing attempt.

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/roblox-free-model-roller-coaster-game-hack PDF link annotation
    • http://xenonsvjetla.com/files/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/trial-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://xenonsvjetla.com/files/pubg-uc-uae_GM1330123889.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/moon-active_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-hack-on-roblox-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-get-free-robux-by-playing-games_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_off00003170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3170 22656 bytes
SHA-256: 45ab4fbd16094afcd86dbc431c31a2b99485aea0909d2f8e996c7389344e8f20
font_01_sfnt_off0000644a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644A 19124 bytes
SHA-256: 0508801c95ebf01c57ae0f4d66aef8d56d9fa66846851f84043ff8edd8566363

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