Malicious PDF — malware analysis report

Static analysis result for SHA-256 348be12c3c8a1728…

MALICIOUS

PDF

46.2 KB Created: 2021-05-11 18:31:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: db7b2c8f6cdab5e2d93afa0c735f8c71 SHA-1: 6f6ad39f0e294700741b2d49ec1c7a13b4f844e7 SHA-256: 348be12c3c8a17288eb2fb03a6db1aa6eb0c7e3ad4c1e2db8f5570f76f6fae0d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which are related to game hacks and cheats. The ML classifier also flagged this PDF as malicious. The embedded JavaScript likely facilitates the download or redirection to malicious content, and the extensive link farm serves as a lure for users seeking illicit software or in-game advantages. The document's structure and content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9278

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://netcdn.xyz/app/479516143/minecraft-pe-hacks-2021-game-hack
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-spins-cheat_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-a-lot-of-robux_GM431946152.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/free-spins-on-coin-master_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/can-u-get-free-robux_GM431946152.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/free-printable-minecraft-coloring-pages_GM479516143.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/free-spins-from-coin-master_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/2021-free-spins-coin-master_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/robux-gratis_GM431946152.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/free-multiplayer-minecraft-server_GM479516143.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/play-minecraft-online-free_GM479516143.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/old-roblox-accounts-for-free_GM431946152.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/minecraft-reach-hack_GM479516143.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-fun-hack-online_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/scaffold-minecraft-hack_GM479516143.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/download-hacked-games-com-coin-master_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/get-free-robux-gg_GM431946152.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/hack-free-spin-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ca8.bin
cbd5195f0b56c95cf5fcb98232a515d6096c53682de476c796630fe22ee64fa7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA8 26812 bytes
font_01_sfnt_off000088b5.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88B5 2840 bytes
font_02_sfnt_off00009267.bin
928fda8d6cdf740c8aa958f6e9db818f0cdae9318cc1084247adea2ad4ad4e6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9267 18296 bytes

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