Malicious PDF — malware analysis report

Static analysis result for SHA-256 95dae4c8816a0b45…

MALICIOUS

PDF

34.4 KB Created: 2021-07-08 06:56:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c1982cec8827561becba755ba8fbffdd SHA-1: 7d9498a9f61174c15986f7bac156e75f2e17045f SHA-256: 95dae4c8816a0b4599900a54ff1d79e8194d1bb05ea8dddf8fa7a6501996e9d2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a document body that promotes 'free spins' and 'hacks' for popular games, indicating a phishing or scam attempt. The heuristic PDF_SEO_LINK_FARM firing suggests a large number of these links are present, likely leading to malicious sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of this document.

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-free-spins-hack-game-hack
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/level-7-lua-executor-free-hack-roblox_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-coins_GM406889139.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/can-i-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-spin-link-free_GM406889139.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-robux-pastebin_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-can-i-get-free-robux_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/rbl-gg-free-robux_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-rewards_GM406889139.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-robux-glitch-2021-september_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/rblx-city-free-robux_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-generator_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-phone_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-links-that-don-t-expire_GM406889139.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-report-hacker_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-i-cheated-for-this-axe_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hacked-apk-download-for-android_GM406889139.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-phantom-forces-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f9b.bin
2084c6c5addda75608b578314cfe65caa2748a4ddf7461c307a4abc8ca01d6df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9B 23108 bytes
font_01_sfnt_off00006387.bin
bda74eba5f039297e511dddd57f660cdccd001576784cab1ba2dc4ebdf08fb85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6387 18344 bytes

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