Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32c4a3e7a809e60…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 00:07:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 31f13259cbf3fd4a13c7cbf5f235bc5a SHA-1: a1a7518a82b28e39d75015033009c6bb34ce2619 SHA-256: b32c4a3e7a809e60138f0ed6648cbdd82a4dfd3df3df8123b7e01e73af5eed78
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/roblox-script-hacks-game-hack PDF link annotation
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-roblox-accounts-with-passwords-2021_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/hack-r-roblox_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-high-school-2-money-cheats_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-robux-gift-card-giveaway-live_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/blue-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-free-merch_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/hack-de-robux-en-roblox-espaol-en-3-minutos_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-robux-hack-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/wix-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-hack-for-scripts_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-veil-free-download_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-roblox-clothes-boy_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_off000031e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E2 21952 bytes
SHA-256: 36da4d77e1a54438b48c2302d51b7b657d97accd1af9f7ea038a6c4a9b45e738
font_01_sfnt_off00006244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6244 19056 bytes
SHA-256: d579aac1d1158a15ad46381a3b3d03b5c9b37299ce5790291e99ad749e5be703

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