Malicious PDF — malware analysis report

Static analysis result for SHA-256 86bfdbff6322fe52…

MALICIOUS

PDF

43.3 KB Created: 2021-05-16 11:04:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9e9a6eafeb3d16486123892dbb3919de SHA-1: ee4bd81c59398a5f1b4bf143e8cfe061a216a73a SHA-256: 86bfdbff6322fe529dbbea612ddebc2342bb993d73bdb736138b41da15217bd8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external websites, many of which are hosted on suspicious domains and appear to be part of a link farm. The document's content and the linked URLs suggest a lure for downloading free game accounts or in-game currency, which is a common tactic for distributing malware. The ML classifier also flagged this PDF as malicious with high confidence.

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/minecraft-java-free-account-game-hack
    • http://agritrade-ukraine.com/images/coin-master-hack-apk-download_GM406889139.pdf
    • http://agritrade-ukraine.com/images/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://agritrade-ukraine.com/images/minecraft-sign-up-free_GM479516143.pdf
    • http://agritrade-ukraine.com/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • http://agritrade-ukraine.com/images/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • http://agritrade-ukraine.com/images/minecraft-free_GM479516143.pdf
    • http://agritrade-ukraine.com/images/archery-master-3d-unlimited-coins-hack_GM406889139.pdf
    • http://agritrade-ukraine.com/images/free-spins-on-coin-master-iphone_GM406889139.pdf
    • http://agritrade-ukraine.com/images/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://agritrade-ukraine.com/images/roblox-microsoft-rewards_GM431946152.pdf
    • http://agritrade-ukraine.com/images/coin-master-tips_GM406889139.pdf
    • http://agritrade-ukraine.com/images/free-spins-for-coin-master_GM406889139.pdf
    • http://agritrade-ukraine.com/images/coin-master-free-spins-blogspot_GM406889139.pdf
    • http://agritrade-ukraine.com/images/coin-master-hack-no-download_GM406889139.pdf
    • http://agritrade-ukraine.com/images/free-robux-app_GM431946152.pdf
    • http://agritrade-ukraine.com/images/can-you-really-hack-coin-master-ios_GM406889139.pdf
    • http://agritrade-ukraine.com/images/how-to-get-2021-robux-for-free_GM431946152.pdf
    • http://agritrade-ukraine.com/images/how-to-get-free-robux-without-offers_GM431946152.pdf
    • http://agritrade-ukraine.com/images/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://agritrade-ukraine.com/images/minecraft-for-ps3-free_GM479516143.pdf
    • https://code.giftcards.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049e9.bin
6f8475d16d8ca968ad415de88d267f7777a0c9d3942c26794c9321835317dae2
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E9 27572 bytes
font_01_sfnt_off00008774.bin
787ae5aa2fe8ee3e05b40f55ac2adb21d77115e18bda7782f632936ac93a1380
pdf-font-stream PDF embedded font (sfnt) at offset 0x8774 18128 bytes