Malicious PDF — malware analysis report

Static analysis result for SHA-256 5738f051e1c64c79…

MALICIOUS

PDF

51.4 KB Created: 2021-06-13 22:27:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 14938a26747c554163b934291bb7a366 SHA-1: 1e6791c4317f625f912fa4ca1bba1e92cd343da4 SHA-256: 5738f051e1c64c794110ef5a573e511ef8475404af90ec3406125c472e7de267
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm designed to appear as legitimate downloads for game-related cheats or resources. The primary URL, http://netcdn.co/app/431946152/future-hack-roblox-game-hack, suggests a lure for game hacking tools. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to potentially harmful content, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9348

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.co/app/431946152/future-hack-roblox-game-hack
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/free-hair-roblox_GM431946152.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/google-coin-master-free-spins_GM406889139.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/coin-master-hacks-reddit_GM406889139.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spin-links-december-30-2021_GM406889139.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-april-2021_GM406889139.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/free-robux-no-download_GM431946152.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/www-coin-master-hack_GM406889139.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/blox-land-free-robux_GM431946152.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/hack-the-game-coin-master_GM406889139.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/roblox-studio-free-download_GM431946152.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spin-codes_GM406889139.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/free-minecraft-resource-packs_GM479516143.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/free-pet-food-on-coin-master_GM406889139.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification_GM431946152.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/hack-coin-master-game-apk_GM406889139.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/guide--coin-master-free-tips_GM406889139.pdf
    • http://elearning.mtsn8madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e1e.bin
c4e0a6b0e1076b7e5cc26ab31c82e8e6dee0222497c93adaefbb8e156e918b72		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E1E 26748 bytes
font_01_sfnt_off00008d3b.bin
3f6d4ee842ebbb592f6a6e9fab79935775199bc783056eb1b14eba5be8864853		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3B 7472 bytes
font_02_sfnt_off0000a5e3.bin
33a8e7dd32856208b0195184334c2e4805bb5d9c36254c82fb0692a1149a7d2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5E3 18588 bytes

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