Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a40950d0916c9d4…

MALICIOUS

PDF

48.8 KB Created: 2021-06-03 05:34:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e4c2d5227613dd1c9dbaab2a4361e626 SHA-1: f50b15a4ddd20cb9a63464c476f4d9e42fdd5a3c SHA-256: 6a40950d0916c9d4607f2941430edd7f8b172293d4d119a72d1de98c0b67af5b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector at 'https://netcdn.online/app/431946152/microsoft-rewards-roblox-game-hack'. The document body and embedded URLs suggest a lure for free game currency or hacks, a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and malicious links indicate a high likelihood of redirecting users to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/microsoft-rewards-roblox-game-hack In PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/what-is-wurst_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-minecraft-texture-packs_GM479516143.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/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005387.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5387 26024 bytes
SHA-256: 078ae9a613da683c54264c65ce1cf522dcec8bf4b04cd5c2ad4948d6418f6d68
font_01_sfnt_off00008de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE0 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A87 18772 bytes
SHA-256: a23976718471a6fdcae7ce7dd5040cf4e4fbc736773fff21fb3256870efe62cc

Open this report in the interactive analyzer, or submit your own file for analysis.