Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b92bc56e57372e1…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 07:00:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0a0524cf0dfe9fe361afc3e427b9f820 SHA-1: bf697d4b1f47b0d322ed9589176d27b6c40acc25 SHA-256: 8b92bc56e57372e159baaa147fcd4403f8c5246841d8febb11f969692b5068b8
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a fake CAPTCHA or human verification prompt to trick users into clicking a link. The primary link, http://netcdn.tw/app/431946152/free-robux-codes-no-verification-game-hack, is identified as a malicious redirector. The document's content and embedded URLs suggest a lure for free game currency or hacks, a common tactic for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/free-robux-codes-no-verification-game-hack In PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/pokemon-go-free-candy_GM1094591345.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/10-robux_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-app-download-robux-genurater-on-pc_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/easy-roblox-hacks-not-malware_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-roblox-stuffcom_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-roblox-codes-unused_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/hack-para-coin-master-sin-verification_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
font_00_sfnt_off00002faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAA 22008 bytes
SHA-256: 6c2ad51fe4644cf1f754326c536c8c1730efcd5e4e553f23047135fd6c288c98
font_01_sfnt_off0000605c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605C 19248 bytes
SHA-256: 7c118f3686e549365112848f1cfe4604feffe3fb38e17c4b52e8f2bf9bb9aa8d

Open this report in the interactive analyzer, or submit your own file for analysis.