Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36ad8e79bb07114…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 14:07:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fcd7b6a2541fecb743a97bc136af1785 SHA-1: a238ccb533ee12215c461411c7290a4481064a93 SHA-256: a36ad8e79bb0711468024370acc68e0df6126343d4d8db9f2db6abe8b807e319
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, including one pointing to 'netcdn.tw' and others to an IP address, all related to game cheats and free in-game currency. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a call-to-action button suggests a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and embedded links indicate a likely attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/479516143/best-minecraft-hacked-client-game-hack
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/best-free-roblox-screen-recorder_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/claim-free-robux_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/best-minecraft-hacked-client_GM479516143.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/safe-cheat-ml-roblox_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-robux-for-free-on-pc-gift-card_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux-codes-generator-no-verification_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/robux-hack-with-inspect-element_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-ps4-code-free_GM479516143.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/free-roblox-shirt-girl_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-hack-fbi-meme_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-change-your-username-in-roblox-for-free_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-hack_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-assassin_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux-no-details-needed_GM431946152.pdf
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-fly-hack_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003260.bin
b81bdeb393496b84ccec9a1c53ccd548729f2362b7f9a7ed906b1fa1acc22f03
pdf-font-stream PDF embedded font (sfnt) at offset 0x3260 22824 bytes
font_01_sfnt_off000064fd.bin
86296843b88eed25728c8cc075b43780ca1cc7c9d5e807804b99454961e5616a
pdf-font-stream PDF embedded font (sfnt) at offset 0x64FD 18492 bytes