Malicious PDF — malware analysis report

Static analysis result for SHA-256 3903fababdde9bcb…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 01:16:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f4917b21fe3e5da62b7b26120d23e126 SHA-1: f0c7297929f3905b9d2ff482c0999257a7a398c4 SHA-256: 3903fababdde9bcb93ed70e12b8cee71b6dc643454d170d876ec1ca1e4fabc80
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external PDF files, many of which appear to be SEO-optimized lures for game cheats and hacks. The primary URL, http://netcdn.co/app/431946152/download-roblox-jailbreak-money-hack-game-hack, suggests a direct download attempt for a game hack. The presence of a 'download button' heuristic further supports the malicious intent of directing users to download potentially harmful content.

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/download-roblox-jailbreak-money-hack-game-hack PDF link annotation
    • https://fib.ub.ac.id/sac/repository/create-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-cheats-doawnload_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-code-gen_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-star-wars-clothes-on-roblox-games_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-account_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/vido-roblox-free-robux-generatorcom_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/get-free-robux-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/ariana-grande-clothes-free-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-items-that-now-cost-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/play-coin-master-online-free_GM406889139.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_off00003139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3139 22404 bytes
SHA-256: c9d35fbcc6fd99fcbec44a0939e3cd5875280492e9ccec9b748bd71d69f426af
font_01_sfnt_off00006359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6359 19824 bytes
SHA-256: 8c7b03687fdd855deaf739cb774c10607c3b4373d5871b5dd5696aa6649a3150

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