Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5aa87bf2583c39e…

MALICIOUS

PDF

43.2 KB Created: 2021-06-02 06:50:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5e1436c95a9803336d6d0ca3ea1e9a30 SHA-1: a336fe46a7d5a01973a3d974a330e4a4373d29d4 SHA-256: c5aa87bf2583c39e1dcf8611e85d1311ddf1d6cfa273f8a3483cdb4893192009
142 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links to external websites, many of which appear to be part of a link farm designed to attract users searching for game hacks and cheats. The document body and heuristics indicate a lure for free game hacks, potentially disguised as a download button or referencing remote support tools to facilitate further compromise. The ML classifier strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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-iphone-free-game-hack
    • https://www.gymun.cz/images/minecraft-hacks-pc_GM479516143.pdf
    • https://www.gymun.cz/images/arsenal-hacks-roblox_GM431946152.pdf
    • https://www.gymun.cz/images/get-free-cards-in-coin-master_GM406889139.pdf
    • https://www.gymun.cz/images/free-roblox-usernames-and-passwords_GM431946152.pdf
    • https://www.gymun.cz/images/hack-coin-master-android-game_GM406889139.pdf
    • https://www.gymun.cz/images/collect-free-spins-coin-master_GM406889139.pdf
    • https://www.gymun.cz/images/free-robux-for-kids-no-verification_GM431946152.pdf
    • https://www.gymun.cz/images/coin-master-hack-tool-generator_GM406889139.pdf
    • https://www.gymun.cz/images/coin-master-time-hack-ios_GM406889139.pdf
    • https://www.gymun.cz/images/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • https://www.gymun.cz/images/hack-robux_GM431946152.pdf
    • https://www.gymun.cz/images/minecraft-pocket-edition-free-apk_GM479516143.pdf
    • https://www.gymun.cz/images/free-robux-codes-no-verification-2021_GM431946152.pdf
    • https://www.gymun.cz/images/coin-master-free-spins-generator-no-human-verification_GM406889139.pdf
    • https://www.gymun.cz/images/coin-master-hack-ios-jailbreak_GM406889139.pdf
    • https://www.gymun.cz/images/coin-master-email-rewards_GM406889139.pdf
    • https://www.gymun.cz/images/minecraft-account-hacked_GM479516143.pdf
    • https://www.gymun.cz/images/free-spin-coin-master-2021_GM406889139.pdf
    • https://www.gymun.cz/images/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdf
    • https://www.gymun.cz/images/robux-no-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005034.bin
be3d3a242270d4a09a741ffa917ca8cc1dd94dc654fad748a4871ab3441a6ad2
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5034 24348 bytes
font_01_sfnt_off00008730.bin
d64526d0e07d457868d5eac688c0bc3e5c9817b8b07646f1be3e20c76e1ff486
pdf-font-stream PDF embedded font (sfnt) at offset 0x8730 18052 bytes