Malicious PDF — malware analysis report

Static analysis result for SHA-256 caeaa9e9661369a5…

MALICIOUS

PDF

34.3 KB Created: 2021-06-26 10:12:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e3042aaedcb90ddb8ebb2512d4ce11a2 SHA-1: 6c36ddea26c9937b2ef57ada878cf9d01a8a5e8a SHA-256: caeaa9e9661369a52554ef7a71adbfbd82a7b0fabd5779e9a7bb02f4e56c62c1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many of which point to files with names suggesting game cheats or hacks. The primary URL, http://netcdn.co/app/431946152/scripts-for-hacks-roblox-game-hack, likely hosts a malicious script or payload. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm designed to attract users searching for game-related exploits. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.co/app/431946152/scripts-for-hacks-roblox-game-hack PDF link annotation
    • http://www.thalanghospital.go.th/UserFiles/File/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/hacker-vs-owner-roblox_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-robux-hack-on-ios_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-how-to-get-in-bloxburg-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/quiero-ser-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/oginject-co_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-model-scanner-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_off00002fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD4 21980 bytes
SHA-256: 70cc1ab5571a9a66a67280a6c587fdea21980203a33c89a315c27f6acfcdd56e
font_01_sfnt_off0000605f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605F 19220 bytes
SHA-256: a5198b3e3e9cc4afecb29b329c36818df131261dc970c278a9057ab4de6ace89

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