Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda4bfa218955504…

MALICIOUS

PDF

33.5 KB Created: 2021-07-06 03:40:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 40de176a3e6894573ed5aff49dc800b1 SHA-1: 1ad73f0a391f5212b32c6994afbd42f29bca05a7 SHA-256: eda4bfa218955504865c1e983be30f421216b0d7b299df46df6a0806257f290a
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/835599320/free-college-textbooks-tiktok-game-hack PDF link annotation
    • http://atiltd.com.tw/upload/files/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-codes-ipad_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-get-free-robux-with-games_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-generator-for-card-roblox-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/irobux-robux-cheat_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/mediafre-download-roblox-hack_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-code-hack_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/slerp-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/easy-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/best-roblox-hack-tool_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_off00003013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3013 21752 bytes
SHA-256: ec448019a6f4f3869dfc0861ec4e09446acc6add76c97ff8f0ebf05717a0c098
font_01_sfnt_off00005fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD7 18416 bytes
SHA-256: cdc16ca39fa73cf68f8c49219d219fafe3612aafbc02059d1e064d4f5fa2e8db