Malicious PDF — malware analysis report

Static analysis result for SHA-256 b34c8bed4bac6d9c…

MALICIOUS

PDF

44.5 KB Created: 2021-06-08 13:40:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 367b9ce007b14cd640bb3c2bd7494223 SHA-1: 14279895f6a59cce7aaf9083c0bd4a0449bc0be9 SHA-256: b34c8bed4bac6d9cfc70cb75cb01deb612cc6513e8924f8ba07ea4e039bb5e46
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.tw/app/431946152/hack-para-roblox-para-matar-game-hack PDF link annotation
    • https://uofk.edu/images/pokemon-go-free-walk-hack_GM1094591345.pdfIn PDF document text
    • https://uofk.edu/images/asshurt-roblox-free_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/does-roblox-detect-cheat-engine_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/free-roblox-wp-themes_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/coinmaster-hack_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/roblox-executor-free_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/coin-master-com_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://uofk.edu/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/microsoft-roblox-rewards_GM431946152.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_off0000504e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504E 25172 bytes
SHA-256: d1a6f2f434c112cc74c50bea0a7cf9b0c7899096caa89951d4fd899b27c3fe55
font_01_sfnt_off00008a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A29 18636 bytes
SHA-256: 4c88262eb6b9bda334560f8cdda44a36cb0fbd173b108d6c0fce92e99fad88be

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