Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1f737f87adba107…

MALICIOUS

PDF

38.0 KB Created: 2021-06-18 07:07:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 65ff0c0363937e662ee6fd5282fc98ef SHA-1: ba37ad67c6489c42e5390d7a7c5fd1047d9f7ffd SHA-256: a1f737f87adba1071f096a932739f7ab4b25382b75c15d0d79f940800e748f6d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that advertise game hacks and cheats, specifically for Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms that these links lead to redirectors for such content. While no scripts were explicitly extracted, the presence of these lures and the ML classification strongly suggest a malicious intent to trick users into downloading potentially harmful files or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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-how-to-walk-through-walls-hack-game-hack PDF link annotation
    • http://www.valenciamaids.com/userfiles/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/hack-script-roblox-game-servers_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/instantrobux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BE2 22812 bytes
SHA-256: fac35bc3b401db52ff45573c8b2e6ab4f0386d89ae8d90ee1df9ed3e84a2f287
font_01_sfnt_off00006ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED3 19324 bytes
SHA-256: 0cac3ff4788a59d7ada19b5e3d478cada7dfff2c28e07fe7396bb8aef3546cb7

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