Malicious PDF — malware analysis report

Static analysis result for SHA-256 5961ee4d23a0217f…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 05:16:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 707e09771bb7ecf6890c57a9b630badd SHA-1: 4f7f6d3390585446492db8ff4e354259513d59aa SHA-256: 5961ee4d23a0217f24d899a278143e210d9ae06b512354b3bd4e9181fddab5b8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/406889139/free-spins-and-coins-com-game-hack PDF link annotation
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-on-computer-easy_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/tiktok-free-code_GM835599320.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-on-samsung-phone_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/alone-free-money-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/tiktok-free-download-for-windows-10_GM835599320.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-dragon-ball-z-rage-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/tiktok-free-iphone-12_GM835599320.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-free-staffs_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-yummers_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-minecraft-for-free_GM479516143.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_off00003002.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3002 22940 bytes
SHA-256: 99ad52caca6f0d78b155c2c9e229ff2619dfa2e1102d4b4b2b9aee3a00200158
font_01_sfnt_off000063b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B3 18504 bytes
SHA-256: 1fd8ebdda92b297a515e174869cd147c0798f4867b2b88ca6af1ff2f07f5dfbe

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