Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e8c80b372f8647…

MALICIOUS

PDF

44.9 KB Created: 2021-06-02 16:40:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8fefbd4d4f6ecabd97a79bcb5e82063e SHA-1: 69eb086483dc955894704e7d362690f4a81a70c5 SHA-256: 67e8c80b372f8647ded3eb03998141586092af01f09d0dda79c19c9ccc458ba1
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/431946152/cheats-that-make-you-get-staff-on-roblox-on-computer-game-hack PDF link annotation
    • http://colsaf.co/images/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://colsaf.co/images/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://colsaf.co/images/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://colsaf.co/images/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://colsaf.co/images/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://colsaf.co/images/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://colsaf.co/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://colsaf.co/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://colsaf.co/images/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://colsaf.co/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://colsaf.co/images/infinite-robux_GM431946152.pdfIn PDF document text
    • http://colsaf.co/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://colsaf.co/images/make-robux_GM431946152.pdfIn PDF document text
    • http://colsaf.co/images/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://colsaf.co/images/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://colsaf.co/images/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://colsaf.co/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://colsaf.co/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://colsaf.co/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://colsaf.co/images/free-fans-on-tiktok_GM835599320.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_004_off000052ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52AB 24184 bytes
SHA-256: eefa4b458057154c582260260b2fe8644cbd8cb7c1c6d190a334ea5eaa609103
font_01_sfnt_off000089e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E0 19384 bytes
SHA-256: 9d7bf090e5cddfc7d276562f3e434b8bf8ba9c8ce26a0c78d1fbd75e7bbd5b20

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