Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20885f6f46b2bcc…

MALICIOUS

PDF

35.4 KB Created: 2021-06-29 15:40:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dc68f2ca37e8b22097534bc3d878acde SHA-1: 41cf794a9b5c6e4ccfd96ac7a5c7d1a10b00b4a7 SHA-256: a20885f6f46b2bcc31bc7dac967e1fb169c9a928d1449a3366ef9bac212f7d23
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized pages offering game cheats and hacks for popular games like Roblox. The ML classifier and PDF link farm heuristics strongly indicate malicious intent. The document's primary purpose appears to be directing users to these external sites, likely for malware distribution or phishing.

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/free-codes-for-roblox-assassin-game-hack
    • http://perpus.poltekeskupang.ac.id/repository/inyector-de-hacks-para-roblox_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id//repository/roblox-bloxburg-hack_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/hack-coin-master-android_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-spin-and-win-coin-master_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/rbx-land-free-robux_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id//repository/free-robux-no-downloading-apps_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/hack-para-jailbreak-roblox-dinero-infinito_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/rare-free-links-to-coin-master_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-bucks_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id//repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/roblox-18_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id//repository/get-free-spins-on-coin-master_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-hacker-no-human-verification_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/app-for-free-robux_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-spins-hack-iphone_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/free-robux-hacks-no-verification_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-pe-hacked-client-download_GM479516143.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003301.bin
e01c3df24c6ef73bfba233231e71919cd327c999b9e3cb566f6a676327b338f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3301 22640 bytes
font_01_sfnt_off00006589.bin
c11600f05da7ef59f3743035af0eddcd6f6ca9f5911bb155f903462ceb8ae3d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6589 18944 bytes

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