Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4cd3ff1b2310d7…

MALICIOUS

PDF

52.7 KB Created: 2021-05-17 08:44:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3a0f4a61a64b7c6793699cf055606746 SHA-1: 096dbad856607d71466c83225e0da699407d6296 SHA-256: eb4cd3ff1b2310d7e85ce457dcc18147fe07f7cc86b02366eae65398ae053be1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a heuristic firing for a 'PDF_SEO_LINK_FARM', indicating a likely attempt to drive traffic to external sites. The document body, though partially corrupted, contains a URL related to 'free minecraft'. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further suggests a lure to click on these links. No scripts were extracted, but the overall structure points to a malicious SEO spam or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8788

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/will-minecraft-ever-be-free-game-hack
    • https://www.legclub.org/uploads/files/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/free-spins-link-in-coin-master-2021_GM406889139.pdf
    • https://www.legclub.org/uploads/files/files/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/minecraft-for-chromebook-free_GM479516143.pdf
    • https://www.legclub.org/uploads/files/files/minecraft-18-9-hacked-client_GM479516143.pdf
    • https://www.legclub.org/uploads/files/files/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdf
    • https://www.legclub.org/uploads/files/files/free-roebucks-com_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/free-robux-no-verification-no-download_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/coin-master-heaven-free-spins-today_GM406889139.pdf
    • https://www.legclub.org/uploads/files/files/free-coin-master-spins-hack_GM406889139.pdf
    • https://www.legclub.org/uploads/files/files/google-how-do-you-get-free-robux_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/free-spins-coin-master-links-blogspot_GM406889139.pdf
    • https://www.legclub.org/uploads/files/files/free-spin-link-for-coin-master_GM406889139.pdf
    • https://www.legclub.org/uploads/files/files/how-do-u-get-free-robux-2021_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • https://www.legclub.org/uploads/files/files/mcpe-hack-client_GM479516143.pdf
    • https://www.legclub.org/uploads/files/files/free-spins-coin-master-links_GM406889139.pdf
    • https://www.legclub.org/uploads/files/files/roblox-hax_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/robux-free-gift-card_GM431946152.pdf
    • https://www.legclub.org/uploads/files/files/free-robux-just-enter-username_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004beb.bin
ae9004c22bcc78200401e48e00601d143ca080765adf8b0ca28f4847948a2a3f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BEB 25144 bytes
font_01_sfnt_off0000845d.bin
218d53b68bdddb064f6fba4be822d5b3725ed1cef1a3b42796a8dd99c4a62f4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x845D 7936 bytes
font_02_sfnt_off00009d87.bin
ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D87 4232 bytes
font_03_sfnt_off0000ac14.bin
211f984956e508daade61d8eb22376d96f7c6cd7f6bdb04149b2d856b5b09752		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC14 18168 bytes

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