Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee28c4e954be2376…

MALICIOUS

PDF

46.5 KB Created: 2021-05-16 09:31:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 94f651c091054542d1f4c60d6a91eded SHA-1: 597a99a72817ec4ed91b0dd79d31244fd312c566 SHA-256: ee28c4e954be237612198101bef3032a499e59951604bf55c60135f448640205
142 Risk Score

Malware Insights

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

The PDF contains a fake CAPTCHA lure, aiming to trick users into interacting with malicious links. It also exhibits characteristics of a link farm, with numerous external URLs pointing to potentially harmful content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/how-to-get-free-robux-no-human-verification-2021-game-hack
    • http://www.harveenent.com/uploaded_files/userfiles/files/coin-master-game-hacks_GM406889139.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/how-to-make-a-roblox-group-for-free_GM431946152.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/download-minecraft-java-edition-free_GM479516143.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/roblox-gift-card-for-free_GM431946152.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/free-apk-mods-coin-master_GM406889139.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/como-hackear-coin-master-gratis_GM406889139.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/real-free-robux-codes_GM431946152.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/coin-master-official-fan-page_GM406889139.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/coin-master-hack-that-actually-works_GM406889139.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/new-free-spins-coin-master_GM406889139.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/free-robux-no-verification-2021_GM431946152.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/free-coin-master-spins_GM406889139.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/coin-master-card-hack-2021_GM406889139.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/free-robux-games_GM431946152.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/coin-master-daily-free-coins-link_GM406889139.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/free-robux-no-verification-needed_GM431946152.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdf
    • http://www.harveenent.com/uploaded_files/userfiles/files/free-online-generator-for-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a2a.bin
bc2c1958ed0a7088d9c3d1cb7f860f66b8a1e4a539a22e43892940ceb12a6340		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A2A 25812 bytes
font_01_sfnt_off000085cc.bin
bab8933fc39dc331bc4c1c904a82b1432ab2e02478fa0a59453c98c5c231da8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85CC 2956 bytes
font_02_sfnt_off00008fec.bin
dc7c459a90b1a398d2ee51f52972ed8a07904c77cd045887558a99bdb9823e3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEC 19428 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.