Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8cc3e62e4ca1619…

MALICIOUS

PDF

49.8 KB Created: 2021-06-02 22:54:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4ec63a99b4d40f2f6bca64cee5398ef4 SHA-1: 8ba897d292381ca9490ad5ab4bdfc457204d1106 SHA-256: d8cc3e62e4ca16194af55d7e588ae8cc5d8ed7f8ffec9a305af02ff89a1721fa
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links to external websites, many of which are structured as SEO-optimized PDF files related to game hacks and free in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious attempt to direct users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 https://netcdn.xyz/app/431946152/roblox-fencing-hack-game-hack
    • http://bunadsmaria.com/images/can-you-get-robux-for-free_GM431946152.pdf
    • http://bunadsmaria.com/images/how-to-hack-a-roblox-account-easy_GM431946152.pdf
    • http://bunadsmaria.com/images/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://bunadsmaria.com/images/coin-master-free-spins-2-5-2021_GM406889139.pdf
    • http://bunadsmaria.com/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdf
    • http://bunadsmaria.com/images/coin-master-pet-food-hack_GM406889139.pdf
    • http://bunadsmaria.com/images/coin-master-free-daily-spins_GM406889139.pdf
    • http://bunadsmaria.com/images/rbx-gg-free-robux_GM431946152.pdf
    • http://bunadsmaria.com/images/get-free-spins-on-coin-master-links_GM406889139.pdf
    • http://bunadsmaria.com/images/coin-master-free-spins-facebook_GM406889139.pdf
    • http://bunadsmaria.com/images/can-you-actually-get-free-robux_GM431946152.pdf
    • http://bunadsmaria.com/images/how-to-get-free-robux-no-scam_GM431946152.pdf
    • http://bunadsmaria.com/images/free-robux-without-verification_GM431946152.pdf
    • http://bunadsmaria.com/images/free-robux-without-verify_GM431946152.pdf
    • http://bunadsmaria.com/images/free-custom-minecraft-skins_GM479516143.pdf
    • http://bunadsmaria.com/images/coin-master-free-spins-save_GM406889139.pdf
    • http://bunadsmaria.com/images/blox-supply-free-robux_GM431946152.pdf
    • http://bunadsmaria.com/images/hack-the-coin-master-game_GM406889139.pdf
    • http://bunadsmaria.com/images/best-free-roblox-executor_GM431946152.pdf
    • http://bunadsmaria.com/images/how-to-play-roblox-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051ab.bin
8144f18f7dd337e6f6912a1134d2700c23e3e1b78dbf3ac43683ca95700e491d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51AB 28240 bytes
font_01_sfnt_off000091bf.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91BF 5696 bytes
font_02_sfnt_off00009ed1.bin
55eb0453d34e7feee899c7316bd710081a67cc44f0672746cdd46c97774cb1c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED1 18752 bytes

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