Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3e30f19ee6f372…

MALICIOUS

PDF

34.7 KB Created: 2021-06-19 11:57:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 23ce5a82aa8981057e1297532ae7f67b SHA-1: 2dd9e3fc53032182dd6cf255a93d9685b8115675 SHA-256: 5e3e30f19ee6f372b87decf9172e0ccefc48bed7853665ecedb043a0e66ffe0c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/roblox-xray-hack-download-game-hack. This redirector is likely used to funnel users to malicious websites or download further malware. The document body and embedded URLs explicitly mention game hacks and free in-game items, indicating a lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-xray-hack-download-game-hack In PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-items-in-roblox-camping-game_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-free-school_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/why-you-never-want-to-use-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-create-texture-hack_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/mega-cheat-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-injector_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-planet_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-building-hacks_GM479516143.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_off00002f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F59 22656 bytes
SHA-256: 4b48546d0f87fa7dcab95c54dd8e5a7faeb88dd12b655f0fefa3e6e080c21a11
font_01_sfnt_off00006232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6232 19156 bytes
SHA-256: c913b58e446f4d009fd32913e4b63593b73529091178296750ddd4a97f5cdb40

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