Malicious PDF — malware analysis report

Static analysis result for SHA-256 402c6dcb99eee42c…

MALICIOUS

PDF

35.1 KB Created: 2021-07-09 19:37:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e9790639affc89b201a9ca6446635935 SHA-1: c28a3ee7a4eeb7ebf353f871cf7b4154c33fc867 SHA-256: 402c6dcb99eee42cefd63e5a75b995c5e358e5c87b5381e2c23c7470eb4174c5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and a document body that explicitly lures users with promises of 'free Robux' and game hacks, indicating a phishing or scam attempt. The PDF_SEO_LINK_FARM heuristic suggests a large number of these links are designed to appear as legitimate search results or resources, likely to direct users to malicious sites or downloaders. No scripts were extracted, but the overall structure and content strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-real-game-hack
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-hack-online-2021_GM406889139.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-solar-tycoon-hack_GM431946152.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-royale-high-diamond-hack_GM431946152.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-avatar-for-free_GM431946152.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-hack-spin-link_GM406889139.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/robux-without-verification_GM431946152.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/sentinel-hack-roblox_GM431946152.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-hack-roblox-passwords_GM431946152.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/este-este-unico-hack-que-te-da-robux_GM431946152.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-coins-coin-master-link_GM406889139.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-hack-apocalypse-rising-roblox_GM431946152.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/dreadguard-roblox-hack_GM431946152.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-free-robux-no-human-verification_GM431946152.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/twitter-coin-master-free-spins-link_GM406889139.pdf
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-boost-com-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003338.bin
9b2a7377f086dcf1e47680e641390b6a2afd74de85f45f9333e4fc6a4a398e64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3338 22292 bytes
font_01_sfnt_off00006507.bin
4bc1fb5241f7d1727492069c2276e888dd2add0fc79522b75a602c51baadbe08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6507 18788 bytes

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