Malicious PDF — malware analysis report

Static analysis result for SHA-256 7812ddab2b992704…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 08:47:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 98ed88138220a89dd717a6a92628a2cb SHA-1: 1db0b348afe785ace9e5d16dc65759ea99822a89 SHA-256: 7812ddab2b99270428848258f65c4633f8440e0cf1ee6e1fa6e11a52f9228473
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which appear to be SEO-optimized for game-related hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a download button lure suggests an attempt to trick users into clicking these links. The primary goal appears to be driving traffic to these external sites, potentially for ad revenue, phishing, or hosting further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/406889139/coin-master-free-cards-2021-game-hack
    • https://www.wco.org.uk/uploads/files/files/how-to-hack-roblox-for-robux_GM431946152.pdf
    • https://www.wco.org.uk/uploads/files/files/how-to-hack-someone-on-roblox_GM431946152.pdf
    • https://www.wco.org.uk/uploads/files/files/best-free-spins-link-coin-master_GM406889139.pdf
    • https://www.wco.org.uk/uploads/files/files/coin-master-download_GM406889139.pdf
    • https://www.wco.org.uk/uploads/files/files/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdf
    • https://www.wco.org.uk/uploads/files/files/coin-master-hack-to-get-free-spins_GM406889139.pdf
    • https://www.wco.org.uk/uploads/files/files/minecraft-mobile-free_GM479516143.pdf
    • https://www.wco.org.uk/uploads/files/files/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • https://www.wco.org.uk/uploads/files/files/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • https://www.wco.org.uk/uploads/files/files/minecraft-windows-10-free-trial_GM479516143.pdf
    • https://www.wco.org.uk/uploads/files/files/free-robux-that-actually-works-2021_GM431946152.pdf
    • https://www.wco.org.uk/uploads/files/files/free-robux-redeem-codes_GM431946152.pdf
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-spins-2021_GM406889139.pdf
    • https://www.wco.org.uk/uploads/files/files/is-minecraft-free-on-ps4_GM479516143.pdf
    • https://www.wco.org.uk/uploads/files/files/minecraft-java-account-free_GM479516143.pdf
    • https://www.wco.org.uk/uploads/files/files/how-to-hack-coin-master-cheat-engine_GM406889139.pdf
    • https://www.wco.org.uk/uploads/files/files/free-outfits-roblox_GM431946152.pdf
    • https://www.wco.org.uk/uploads/files/files/how-you-get-robux_GM431946152.pdf
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-spin-ml_GM406889139.pdf
    • https://www.wco.org.uk/uploads/files/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051de.bin
4ede6d25d2e6c39d4176e1eb88e3e4d12409c7786da8268a10105577cef86395
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51DE 26992 bytes
font_01_sfnt_off00008ea4.bin
1103c1a9052967993c67e1ec6a20b7963a45820bc749ae4085be8aaf66ba1d93
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA4 18288 bytes