Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecefc65bf956ee12…

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 20:40:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a42c258b717314135760cca9a7298663 SHA-1: 7cde382f6eda864c92570b56384eb7938a50e401 SHA-256: ecefc65bf956ee12a9efcf2dcb9e965569966a0b8ee39ee179935b26e89be335
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to resources related to game hacks and modified applications, such as 'coin-master-3.2-mod-hack-apk-download-game-hack'. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The ML classifier strongly indicated maliciousness, suggesting the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-3.2-mod-hack-apk-download-game-hack
    • http://perpustakaan.pn-tilamuta.go.id/repository/earn-free-robux-on-roblox_GM431946152.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/minecraft-pe-hacks-ios_GM479516143.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/100-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-claim-free-spins_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/ultimate-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-free-spins-only_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-free-spins-facebook_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/is-roblox-studio-free_GM431946152.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-printable-roblox-coloring-pages_GM431946152.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/how-to-get-free-shields-on-coin-master_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-robux-without-downloading-anything_GM431946152.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-free-coins-and-spins-today_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/como-hackear-coin-master-2021-espaol_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-spins-and-coins-coin-master-links_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/roblox-free-no-download_GM431946152.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/minecraft-realms-free-trial_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c25.bin
3e77e48f90cc5bf8a3ad438cadf4e08fa8155bdb03c6d3f7828920406153b4f5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C25 23692 bytes
font_01_sfnt_off000081bd.bin
ff135a53a420a418677011958d681f26302d42eb767583c3b8513888fb402d9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81BD 18836 bytes

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