Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0657f9c6a0b155f…

MALICIOUS

PDF

36.9 KB Created: 2021-05-20 15:55:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 21f372700d4448e1b9b0bf9f747ea8d1 SHA-1: e3a9dab3692606bf96ddaa9eeb2208982cee44bb SHA-256: f0657f9c6a0b155f7a717e21c2075d6d9572e21fb9efa330c17160c328e76c18
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a social engineering lure, presenting itself as a way to get 'free TikTok followers' and displaying a fake CAPTCHA to trick the user into clicking a link. The primary link, https://netcdn.xyz/app/835599320/free-tiktok-followers-no-human-verification-or-survey-2021-game-hack, is associated with a redirector and likely leads to a malicious payload. The document's structure and embedded links suggest it is designed to exploit user interest in online generators and game hacks to facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9616

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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.xyz/app/835599320/free-tiktok-followers-no-human-verification-or-survey-2021-game-hack PDF link annotation
    • http://dieter-sauter.com/images/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000310a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x310A 26160 bytes
SHA-256: 384e0d21023ad2bf5b70bd254bfa9dc2440b080b2f0a50177b59ae2b05d928c2
font_01_sfnt_off00006c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5B 19152 bytes
SHA-256: c6aae516a535c20688ad74e4aa12997c302b82eea592ee03757e951f101f6a27

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