Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d1f1f6d9b352c8…

MALICIOUS

PDF

48.6 KB Created: 2021-06-10 22:03:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3ab1e438cc384a2f2d6593a4a36342fe SHA-1: 74afc06eff8e72d6227aff48177e057ac591f6c1 SHA-256: 32d1f1f6d9b352c8c75940187d0fb3bdcf9d6735265d0957a6ff5170885501c7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a fake CAPTCHA lure, a common social engineering tactic to trick users into interacting with malicious content. It also embeds multiple URLs, including one pointing to 'netcdn.tw' and several to 'technologicalsc.com', which likely serve as download locations for further malicious payloads. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/free-roblox-gift-card-codes-2021-giveaway-game-hack
    • http://technologicalsc.com/images/20210-free-spin-links-for-coin-master_GM406889139.pdf
    • http://technologicalsc.com/images/free-robux-site_GM431946152.pdf
    • http://technologicalsc.com/images/coin-master-game-hack-kaise-kare_GM406889139.pdf
    • http://technologicalsc.com/images/free-robux-mod_GM431946152.pdf
    • http://technologicalsc.com/images/how-to-get-free-robux-video-no-hacking_GM431946152.pdf
    • http://technologicalsc.com/images/minecraft-for-ps3-free_GM479516143.pdf
    • http://technologicalsc.com/images/free-100-robux_GM431946152.pdf
    • http://technologicalsc.com/images/free-spin-card-exchange-coin-master_GM406889139.pdf
    • http://technologicalsc.com/images/my-minecraft-account-was-hacked_GM479516143.pdf
    • http://technologicalsc.com/images/javascript-free-robux_GM431946152.pdf
    • http://technologicalsc.com/images/free-coins-on-coin-master_GM406889139.pdf
    • http://technologicalsc.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://technologicalsc.com/images/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://technologicalsc.com/images/robux-logo-hack_GM431946152.pdf
    • http://technologicalsc.com/images/coin-master-game-hunters-club_GM406889139.pdf
    • http://technologicalsc.com/images/how-to-get-free-spins-grom-coin-master_GM406889139.pdf
    • http://technologicalsc.com/images/minecraft-on-computer-free_GM479516143.pdf
    • http://technologicalsc.com/images/roblox-territory-conquest-hack_GM431946152.pdf
    • http://technologicalsc.com/images/download-minecraft-free-hiapphere_GM479516143.pdf
    • http://technologicalsc.com/images/minecraft-hack-download_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fe0.bin
7e01e0a943a3c5ac75b4e9a32a4b00db230065542bfb9fd9f45961289d996710		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FE0 26792 bytes
font_01_sfnt_off00008dfd.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFD 2824 bytes
font_02_sfnt_off000097ac.bin
aa0364317709c15a00d5b3b335a82ed90bbb248bc67144f2c0392111c6772de1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97AC 19432 bytes

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