Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7317220dd8d110a…

MALICIOUS

PDF

34.7 KB Created: 2021-07-08 06:20:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b0f15a8ba04691744a80f82d88ea60db SHA-1: 6170f24e1de2e1a92baee0f54f2c7ed17f646d12 SHA-256: b7317220dd8d110a8bcf11b99515652d5c3469c9a5b26bc8bfda70f26bd6b520
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document displays a fake CAPTCHA lure to deceive users into interacting with malicious links, as indicated by the SE_FAKE_CAPTCHA heuristic. The primary malicious URL, http://netcdn.tw/app/479516143/how-to-make-a-minecraft-pe-server-for-free-game-hack, is embedded and also present in the document body, suggesting it is the intended destination for payload delivery or credential theft. No scripts were extracted, but the PDF structure and heuristics strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/how-to-make-a-minecraft-pe-server-for-free-game-hack
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/roblox-robux_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-robux-hack-2021-working_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/bloxpink-free-robux_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/minecraft-free-minecraft_GM479516143.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/robux-free-gift-card-org-hack_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/blox-rewards_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-robux-2021_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/2021-roblox-place-free-bricks-image_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-iphone_GM406889139.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/coin-master-fan_GM406889139.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-pc_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/is-minecraft-bedrock-free_GM479516143.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-spin-in-coin-master_GM406889139.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-item-roblox-pastebin_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/coin-master-server-hack_GM406889139.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-face-roblox_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-links-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003244.bin
28eac695a564e998a08eaa0e7fb6452c5d028139543b63a60b4487d3a4500b5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3244 22516 bytes
font_01_sfnt_off0000642c.bin
c89e4691513c00e354edf6fcf3f8a9e88803d22052e21f9d0b0194281752c518		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642C 18600 bytes

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