Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f73352bb7ecf09…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 19:32:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 93a373d13c654cfe302c066e27f58b06 SHA-1: 7fda4bb55175e8f522a29751c317a0246b0e4adc SHA-256: 89f73352bb7ecf09ab6d6869770e0aa6724b89221c5a30cda34cadb0377a5153
102 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are related to game hacks and cheats for popular games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier strongly suggests maliciousness. The document body, though partially corrupted, also contains URLs pointing to these game hack sites.

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/406889139/coin-master-hack-dot-xyz-game-hack
    • http://perpustakaan.pa-dompu.go.id/repository/free-spins-on-coin-master-cheat_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-free-body-bundle_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/como-hackear-coin-master-ios_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/how-to-get-free-robux-app_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/free-spin-coin-master-instagram_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-jailbreak-god-mode-hack_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-hack-no-download-or-survey_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-t-shirt-template-free_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/windows-10-minecraft-hacks_GM479516143.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/free-vpn-for-minecraft_GM479516143.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/freerobuxhack-us-2021_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-how-to-hack-rs16_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/easiest-money-hack-february-roblox-rocitizens_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/free-minecraft-maps_GM479516143.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/hack-roblox-page_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033d7.bin
afb542024f28b05f0f34ce5b2ebd3d9a9b606a8f0cc0c20c408d44d95c85007d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33D7 22960 bytes
font_01_sfnt_off0000674b.bin
c26c40ee4891c1d47adb0e8ebae699ddddaaac98e823d7b201e7cc814470c871		 pdf-font-stream PDF embedded font (sfnt) at offset 0x674B 18660 bytes

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