Malicious PDF — malware analysis report

Static analysis result for SHA-256 3301517378ec3c3a…

MALICIOUS

PDF

51.8 KB Created: 2021-06-03 10:55:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7f893607b2ed14af500fc92f48df63b5 SHA-1: 4687d900a7843df4e313c06337cb94a3ca03c541 SHA-256: 3301517378ec3c3abf07360908fb78120c8012091335c2d064a5ff39775ce967
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized pages offering 'free Robux' or 'free spins'. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed to drive traffic to potentially malicious or phishing sites. No scripts were extracted, but the embedded URLs and the document's theme point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

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/431946152/free-robux-gift-card-codes-2021-game-hack
    • https://ifef.es/ckfinder/userfiles/files/roblox-robux_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/wahoogaming-co-free-robux_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-snacks-in-coin-master_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-followers-on-roblox_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/cool-free-minecraft-skins_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/robloxheroxyz-free-robux_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-attack-madness-hack_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-free-coins-twitter_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-robux-inspect_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/roblox-install-free_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/give-me-free-robux_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/flame-gg-free-robux_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/claim-free-spins-coin-master_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/huskybuscom-free-robux_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005406.bin
888bd4c69d66cd8480673cc9b57d3c4cc35d13307771e108949ddb0e169bd87d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5406 28204 bytes
font_01_sfnt_off0000938e.bin
a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x938E 7448 bytes
font_02_sfnt_off0000a571.bin
a83203ba6d4d8e4db234da74518c811315008a13a6a61ff598d06d89853e7c2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA571 19044 bytes

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