Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bd2cf4f82537b10…

MALICIOUS

PDF

46.7 KB Created: 2021-05-13 07:49:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ed3c4c8cddb8427f2929d1fe94d6240d SHA-1: ed3e9c9d32bcd7c67c52aa69b8791a0d43bddd07 SHA-256: 8bd2cf4f82537b1006e02f415ae4a6268d4ebeeff546994b98857a11efba8651
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to domains associated with free in-game currency or software hacks. The ML classifier also flagged this PDF as malicious. The presence of these links suggests a lure to download potentially unwanted or malicious software, or to engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9299

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/406889139/coin-master-free-spin-no-offers-game-hack
    • http://immo360grad.com/images/www-bandicam-com-free-robux_GM431946152.pdf
    • http://immo360grad.com/images/how-do-you-download-minecraft-for-free_GM479516143.pdf
    • http://immo360grad.com/images/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdf
    • http://immo360grad.com/images/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://immo360grad.com/images/free-roblox-outfits_GM431946152.pdf
    • http://immo360grad.com/images/promo-codes-for-free-robux_GM431946152.pdf
    • http://immo360grad.com/images/coin-master-daily-free-coins-link-today_GM406889139.pdf
    • http://immo360grad.com/images/coin-master-free-cards-link_GM406889139.pdf
    • http://immo360grad.com/images/coin-master-hacked-apk-download-for-android_GM406889139.pdf
    • http://immo360grad.com/images/microsoft-rewards-roblox_GM431946152.pdf
    • http://immo360grad.com/images/how-to-hack-a-minecraft-server_GM479516143.pdf
    • http://immo360grad.com/images/free-robux-pins_GM431946152.pdf
    • http://immo360grad.com/images/hack-coin-master-android-game_GM406889139.pdf
    • http://immo360grad.com/images/robux-premium_GM431946152.pdf
    • http://immo360grad.com/images/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://immo360grad.com/images/coin-master-20-free-spins-link-today_GM406889139.pdf
    • http://immo360grad.com/images/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://immo360grad.com/images/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://immo360grad.com/images/roblox-robux_GM431946152.pdf
    • http://immo360grad.com/images/mosttechs-coin-master-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000487b.bin
c00964232bf1598727997eddda55ae5f7ec14db825d3593e2a35884254a6f53b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487B 29172 bytes
font_01_sfnt_off00008b5b.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5B 2880 bytes
font_02_sfnt_off00009546.bin
eca834da90127d06b30cbbdb6bc39378e5aaec836d7f1468a5bfe601ae733219
pdf-font-stream PDF embedded font (sfnt) at offset 0x9546 17884 bytes