Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c126bfb021af98…

MALICIOUS

PDF

37.5 KB Created: 2021-06-18 01:36:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1dd8744ee049edbc0e95d6f57e1d4ade SHA-1: f910f073e49a3f90afbb7f258be1ff3adf14b8ea SHA-256: c0c126bfb021af987a9ef06bcd93e07e0d4d284c7217429ae02f9d30c488a641
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, suggesting it is designed to redirect users to external sites. The ML classifier and PDF heuristics indicate malicious intent, likely to trick users into downloading malware or visiting phishing pages related to game exploits. No scripts were extracted, but the presence of many external links and the 'download button' heuristic point towards a social engineering attack.

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/how-to-get-everything-free-on-roblox-2021-game-hack PDF link annotation
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-hack-every-game-in-roblox_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/wurst-115_GM479516143.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/tat-ca-cac-do-free-trong-roblox_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/infinite-yield-hack-roblox_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/500-robux-free_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/does-roblox-get-hacked_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/elemental-battleground-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-free-spain_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_off00003b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B87 21936 bytes
SHA-256: b3ea9b21ba9ac21ce6c5ef8a2ea79263dbb2b768def405e0d9856327529f2a9f
font_01_sfnt_off00006baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAF 19716 bytes
SHA-256: fb05f3fba59d4a6c73aa937ed8ac92dd1bb0f1c824112952c2604905533379a7

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