Malicious PDF — malware analysis report

Static analysis result for SHA-256 789cbb0b6a7eda00…

MALICIOUS

PDF

34.0 KB Created: 2021-06-27 07:50:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d0eadc0f3f0a567e44c29f5c713a8649 SHA-1: 42196a7dd32afd9e95b97451585eced9af8dae6e SHA-256: 789cbb0b6a7eda0015bfdb1d5d635b64c50d5e693ab1f968cd0acfbfbbe0d327
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDFs, suggesting a link farm designed to attract users searching for game cheats. The ML classifier also flagged this PDF as malicious. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful content, likely for exploitation or further malware delivery.

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/como-ser-hacker-en-roblox-android-game-hack
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-no-human-verification-easy_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/roblox-hack-tools-in-the-game-no-mega-android-tutorial_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/free-epic-face-roblox_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-robux-on-laptop-2021_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-blogspot_GM406889139.pdf
    • http://opac.disarpus.surakarta.go.id/repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdf
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-d_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/free-codes-on-roblox-mining-simulator_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/free-coins-and-spins-coin-master_GM406889139.pdf
    • http://opac.disarpus.surakarta.go.id/repository/cheat-codes-for-coin-master_GM406889139.pdf
    • http://opac.disarpus.surakarta.go.id/repository/blox-fish-free-robux_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-link-today_GM406889139.pdf
    • http://opac.disarpus.surakarta.go.id/repository/hack-coin-master-apk-2021_GM406889139.pdf
    • http://opac.disarpus.surakarta.go.id/repository/free-money-in-ultimate-driving-roblox_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/roblox-phantom-forces-hack-mac_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/comment-faire-cheater-sur-roblox_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdf
    • http://opac.disarpus.surakarta.go.id/repository/comment-hacker-des-personnes-pour-avoir-des-robux-sur-roblox_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-without-survey_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/hacking-apps-for-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e63.bin
6a933eca220c9e03174c326f649b93c34a3ef22731fec97ebcd8321b6738bba5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E63 22152 bytes
font_01_sfnt_off00005f66.bin
1a839992e1124669865ea0952c81ad7bd6c204d549c0002ff2b6c5e2940f3618		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F66 19208 bytes

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