Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dcabaac5f8fe28f…

MALICIOUS

PDF

40.8 KB Created: 2021-05-16 17:05:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 72ce640fa4fd289eec7c7e91dcbeafe7 SHA-1: f16ebda8178428c6c376bf46e20e05ae5e03b1e8 SHA-256: 5dcabaac5f8fe28f04b659c34a7251dff1d4005902113ff66c6a6f38489ca9b9
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to websites offering free in-game items or currency. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' lure further supports a scam or phishing attempt. The primary IOCs are the URLs leading to these potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/roblox-rules-game-hack
    • https://www.sahebspices.com/uploaded_files/userfiles/files/claim-gg-free-robux_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/best-free-minecraft-hacked-client_GM479516143.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/free-roblox-card_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/coin-master-free-spins-uk_GM406889139.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/roblox-gift-card-online-free_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-chromebook_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/free-spins-coin-master-links-2021_GM406889139.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/20210-robux_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/earn-free-spins-in-coin-master_GM406889139.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/free-robux-no-verify_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/juego-hackeado-de-coin-master_GM406889139.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/microsoft-roblox_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/how-to-earn-robux_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/oprewards-com-login_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/hack-to-protect-village-on-coin-master_GM406889139.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/is-roblox-free-on-pc_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046ae.bin
052d3a78c5d986f20bad490982a5b0835788d76b0b61b0ad4a65bc30e3179f7a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46AE 24148 bytes
font_01_sfnt_off00007dca.bin
f162e737085b1f1ed51f82e9ad2b4c8c461b0666f4fcd46865d599c97541ad9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCA 17924 bytes

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