Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2a318dfe555c29…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 07:46:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 80dda102b5bcaec6c8e943570a96af91 SHA-1: 06cc6f579b489ae803ea51be28279011e725f482 SHA-256: 3b2a318dfe555c295003e041a9630f30fc303630b3da0bae638924b50504cb04
82 Risk Score

Malware Insights

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

The PDF document contains embedded links and a call-to-action phrase, consistent with a social engineering lure to download potentially malicious content. The heuristic 'SE_CLICKFIX' indicates the document likely instructs the user to execute a command, further supporting a malicious intent to bypass security measures. The primary IOC is the external URL used to host the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • 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
  • 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.online/app/479516143/minecraft-115-2-hacks-game-hack
    • https://zarco.co.in/uploaded_files/userfiles/files/is-minecraft-bedrock-free_GM479516143.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/play-minecraft-online-free_GM479516143.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/roblox-hacked-com-2021_GM431946152.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-spins-free-2021_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/games-that-can-be-hacked_GM431946152.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-spin-blogspot_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/free-draw-2-roblox_GM431946152.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/free-roblox-toy-codes_GM431946152.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/roblox-fun-com-robux_GM431946152.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/daily-free-spins_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-ad_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/free-robux-download_GM431946152.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-fun-free-spins_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/classic-minecraft-net-hacks_GM479516143.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/free-coins-coin-master-2021_GM406889139.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/minecraft-hack-download_GM479516143.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-roebucks-without-verification_GM431946152.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/can-you-get-robux-for-free_GM431946152.pdf
    • https://zarco.co.in/uploaded_files/userfiles/files/roblox-com-redeem_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050ca.bin
e39828300486c6f6a35f7d9ced73c157b9f45b35945f018d632dfee17f15230b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50CA 29756 bytes
font_01_sfnt_off00008f83.bin
2d3b27b408d3f739dac69892bb77828e37852eeadeb3aca8b5b98d14a7739d0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F83 18100 bytes

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