Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da11f744931917e…

MALICIOUS

PDF

46.7 KB Created: 2021-06-13 17:32:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0d65d901d3fcc18b24a10398744e4de6 SHA-1: a4d957a8f1bbc9db5c23ee7b2bcb8641440e06cf SHA-256: 4da11f744931917e61849e3036a39408d0f7246481d93a3119aa066934f3c7f2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are structured as SEO-optimized links to other PDF files, suggesting a link farm designed to attract traffic. The document body, though heavily obfuscated, contains references to game cheats and hacks, and an embedded URL points to a potential download. The ML classifier strongly indicates maliciousness, and the presence of many external links suggests a drive-by download or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/roblox-cheat-codes-n-text-game-hack
    • http://hcberg.com/images/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • http://hcberg.com/images/roblox-speed-hack_GM431946152.pdf
    • http://hcberg.com/images/admin-script-roblox-hack_GM431946152.pdf
    • http://hcberg.com/images/how-to-gift-robux-on-mobile_GM431946152.pdf
    • http://hcberg.com/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
    • http://hcberg.com/images/no-scam-free-robux_GM431946152.pdf
    • http://hcberg.com/images/free-robux-no-verification-required_GM431946152.pdf
    • http://hcberg.com/images/huskybuckscom-free-robux_GM431946152.pdf
    • http://hcberg.com/images/how-to-hack-coin-master-root_GM406889139.pdf
    • http://hcberg.com/images/free-modded-minecraft-server-hosting_GM479516143.pdf
    • http://hcberg.com/images/minecraft-gun-games-free_GM479516143.pdf
    • http://hcberg.com/images/coin-master-free-spins-gratis_GM406889139.pdf
    • http://hcberg.com/images/free-robux-no-verification-no-survey_GM431946152.pdf
    • http://hcberg.com/images/how-to-get-a-free-minecraft-account_GM479516143.pdf
    • http://hcberg.com/images/como-ser-hacker-en-roblox-prison-life_GM431946152.pdf
    • http://hcberg.com/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://hcberg.com/images/free-spin-gratis-coin-master_GM406889139.pdf
    • http://hcberg.com/images/emergency-response-liberty-county-roblox-free_GM431946152.pdf
    • http://hcberg.com/images/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://hcberg.com/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • https://discord
    • https://www.roblox.co
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005186.bin
26a9195dc422baa3c6c14e5b3ec6f0f44c564e229af882c77a25e7e6d6d123dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5186 28964 bytes
font_01_sfnt_off00009370.bin
b11b7dadff2d1c785cb53a8dce3695e83e2c04b899b27827d6edb51b56822474
pdf-font-stream PDF embedded font (sfnt) at offset 0x9370 18456 bytes