Malicious PDF — malware analysis report

Static analysis result for SHA-256 24526d00957e9f56…

MALICIOUS

PDF

49.0 KB Created: 2021-06-02 13:00:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3b170c8cd53528d90dfbfba56afbf16d SHA-1: e0b633ee85b3bf0ed2dfd3a3a37194ae68105b8e SHA-256: 24526d00957e9f5601c5ef9320934608c3d39a08dcaab876665b95662f43b6d0
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document contains numerous links to external websites, many of which are structured as SEO-optimized links for 'free Robux' or game hacks. The document also includes heuristics indicating it attempts to lure the user into executing commands via the clipboard or by clicking a download button, consistent with social engineering tactics. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/exploit-hacks-for-roblox-game-hack
    • http://www.compusiteinc.com/images/how-to-get-100-robux-for-free_GM431946152.pdf
    • http://www.compusiteinc.com/images/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • http://www.compusiteinc.com/images/how-to-get-free-robux-easy-on-phone_GM431946152.pdf
    • http://www.compusiteinc.com/images/free-tiktok-followers-without-verification_GM835599320.pdf
    • http://www.compusiteinc.com/images/robux-hack-free-robux_GM431946152.pdf
    • http://www.compusiteinc.com/images/minecraft-hacked-client-bedrock_GM479516143.pdf
    • http://www.compusiteinc.com/images/free-spins-from-coin-master_GM406889139.pdf
    • http://www.compusiteinc.com/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://www.compusiteinc.com/images/hack-coin-master-for-iphone_GM406889139.pdf
    • http://www.compusiteinc.com/images/how-to-get-roebucks-in-roblox_GM431946152.pdf
    • http://www.compusiteinc.com/images/free-robux-games-on-roblox_GM431946152.pdf
    • http://www.compusiteinc.com/images/free-tiktok-fans_GM835599320.pdf
    • http://www.compusiteinc.com/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • http://www.compusiteinc.com/images/tiktok-accounts-for-free_GM835599320.pdf
    • http://www.compusiteinc.com/images/coin-master-real-free-spins_GM406889139.pdf
    • http://www.compusiteinc.com/images/coin-master-hack-no-human-verification-2021_GM406889139.pdf
    • http://www.compusiteinc.com/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdf
    • http://www.compusiteinc.com/images/get-free-robux-com_GM431946152.pdf
    • http://www.compusiteinc.com/images/games-that-can-be-hacked_GM431946152.pdf
    • http://www.compusiteinc.com/images/roblox-prison-life-hack_GM431946152.pdf
    • https://www.bandicam.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e05.bin
f3456c35b52197ae44cfaad55d3d1d5bd38af904e85a45dad0279c3cd23b6944		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E05 27208 bytes
font_01_sfnt_off000089a2.bin
a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89A2 7448 bytes
font_02_sfnt_off00009b85.bin
b0b431a38282b287cee6a9192754aa92565d0d69c3453df8310b70c2e72ca55c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B85 18748 bytes

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