Malicious PDF — malware analysis report

Static analysis result for SHA-256 737fd825e431b331…

MALICIOUS

PDF

43.1 KB Created: 2021-05-15 15:15:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c083f5940a9a6c03500879f03dc8d3eb SHA-1: e515ff2b1579535c765accdeb720f2ba8da8db12 SHA-256: 737fd825e431b331c1ac6131cb090135cda0c8264c41120f5710c8c93e2e2ccd
102 Risk Score

Malware Insights

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

The PDF contains a high volume of external links, many of which point to resources related to game hacks and rewards, suggesting a lure for potentially unwanted software or malware. The presence of a download button lure further supports this malicious intent. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/479516143/wurst-client-1.12-2-game-hack
    • http://fishtech.is/images/microsoft-rewards-robux_GM431946152.pdf
    • http://fishtech.is/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • http://fishtech.is/images/coin-master-heaven-links-free-spins_GM406889139.pdf
    • http://fishtech.is/images/bloxawards-com-earn-free-robux_GM431946152.pdf
    • http://fishtech.is/images/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdf
    • http://fishtech.is/images/coin-master-hack-ios-no-verification_GM406889139.pdf
    • http://fishtech.is/images/coin-free-spin_GM406889139.pdf
    • http://fishtech.is/images/get-free-spins-coin-master_GM406889139.pdf
    • http://fishtech.is/images/get-robux-today_GM431946152.pdf
    • http://fishtech.is/images/coin-master-hack-app-android-download_GM406889139.pdf
    • http://fishtech.is/images/roblox-free-items-2021_GM431946152.pdf
    • http://fishtech.is/images/coin-master-free-coins-hack_GM406889139.pdf
    • http://fishtech.is/images/coin-master-game-free-spin_GM406889139.pdf
    • http://fishtech.is/images/free-minecraft-premium-account_GM479516143.pdf
    • http://fishtech.is/images/rbxoffer-com-free-robux_GM431946152.pdf
    • http://fishtech.is/images/roblox-play-as-guest-free_GM431946152.pdf
    • http://fishtech.is/images/how-to-get-a-lot-of-robux_GM431946152.pdf
    • http://fishtech.is/images/minecraft-112-2-hacked-client_GM479516143.pdf
    • http://fishtech.is/images/coin-master-hack-no-verification-ios_GM406889139.pdf
    • http://fishtech.is/images/coin-master-daily-free-spin-and-coin-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004602.bin
b10122589b73e6e6ba65e0131f57f5adb8889d6a6e41098f73ce1b1107245b74		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4602 30284 bytes
font_01_sfnt_off00008746.bin
311fa6a3c8ed3152b86259a6f2b4fd65ad6ae6b737d77785fc3ef6c3d9292616		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8746 18048 bytes

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