Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a1642b10ae4d6d…

MALICIOUS

PDF

43.0 KB Created: 2021-05-17 18:37:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0da7d085a8685593d260f10b5aac6878 SHA-1: db4ff78c3c52cca5fe6b14151a8fed2a04da11b6 SHA-256: 33a1642b10ae4d6d32dcf0571b114e75230d7b7c2605ada7c4b8758374f0141d
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 link farms for 'free Robux' or 'Coin Master' cheats. The presence of a call-to-action button and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or scams. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt.

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/robloxfun-com-generator-game-hack
    • http://apostolosandreaslemesou.com/images/free-robux-for-kids-no-verification_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-free-spin-codes_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/robux-codes-generator-no-human-verification_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/real-robux-generator-2021_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-free-spins-link-today-new_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-free-spins-link-app-download_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-free-coins_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/free-links-coin-master_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-free-spins_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-hack_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/free-coin-master-spins-2021-link_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/free-coin-master-app_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/roblox-script-hack_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/minecraft-hacks-xbox_GM479516143.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-ultra-attack-hack_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-free-spins-for-today_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/free-account-roblox-with-robux_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-haktuts_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004af7.bin
58b82e9abbe6d2a62c1454fbf6dd7fe76aeeedeb6b24c831e92a410fed0a5d02		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF7 26156 bytes
font_01_sfnt_off00008519.bin
c214cdc5875b8c54705917548ad95da7f9ccbf3c1d69b6e52c4f4c9c63cb00fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8519 18516 bytes

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