Malicious PDF — malware analysis report

Static analysis result for SHA-256 a23d8b2429ca63f9…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 20:15:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1c3d33ebdfbefd9f7d808faf277ed09e SHA-1: aa2d838dd5948561f64496eeac0acd9011b8fb1c SHA-256: a23d8b2429ca63f90a70d233c56344fa5c67b82f85aa9c281021f9e6d0415136
102 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external URLs that promise game cheats and hacks. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to distribute further malware or engage in phishing. The document's structure and numerous external links suggest an attempt to exploit user interest in free in-game items or exploits, likely leading to the download of malicious payloads.

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.tw/app/431946152/robuxmatchcon-game-hack
    • http://perpustakaan.pn-tilamuta.go.id/repository/roblox-script-hack_GM431946152.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/robux-free-gift-card_GM431946152.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/today-free-spin-link-for-coin-master_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/best-free-roblox-executor_GM431946152.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/hoe-to-get-free-robux-youtube_GM431946152.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/pokemon-go-free-spoofer-ios_GM1094591345.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/how-to-get-free-faces-on-roblox-2021-mac_GM431946152.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-hack-com_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/roblox-hack-2021-pc-download_GM431946152.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-roblox-wings_GM431946152.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/today-free-spin-coin-master_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-vip-for-hammer-simulator-roblox_GM431946152.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-card-hack-app_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/get-pokemon-go-free-coins_GM1094591345.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdf
    • http://perpustakaan.pn-tilamuta.go.id/repository/daily-free-spins-for-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003083.bin
e83e78067cadb171ba72237fce69faec02755a27ec7a995bcc330ed0bf77c600		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3083 22416 bytes
font_01_sfnt_off00006228.bin
22fb853357d700a883506443e03244379ebe89dfe763389f41fb0df375e68649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6228 19084 bytes

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