Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e4c747675585a9…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 09:05:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: adbd588f832fbd666a286e39479152ed SHA-1: 17b4f34b456302d71e4252052cf811280ae3dd52 SHA-256: c4e4c747675585a9456fc9c36cf5efcbe548b057d51ced0a37fb9143c815abb1
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/431946152/free-robux-app-game-hack PDF link annotation
    • http://gts.edu.gh/library/repository/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hacks-for-prisone-life-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-fallen-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-play-bloxburg-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-change-my-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-make-roblox-clothes-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-cotton-candy-roblox-mm2_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-database-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-a-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-kill-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-through-walls-in-jailbreak-roblox_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
font_00_sfnt_off00003146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3146 22720 bytes
SHA-256: 806b5508e2a2c1eaa87f08a1165cb6b1220dc2333e9326569e1c5e5b548bf786
font_01_sfnt_off000063fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FD 18892 bytes
SHA-256: 98799f5422297995f0985cb1c378b21e0f8722881e70436717831cdef5a17d10

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