Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1564d8936a379ce…

MALICIOUS

PDF

33.5 KB Created: 2021-07-03 13:34:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9f53cb3bc3249097911a1e8f27f402af SHA-1: 736a1d481b9cdf08f20aeb9a1c99b850af2205d4 SHA-256: b1564d8936a379ce71b83e63188a23b946af2abbe0dbada42c3190714ea14ffc
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, identified as a link farm, that direct users to pages offering game cheats and hacks. The primary URL, http://netcdn.tw/app/431946152/mathep-game-hack, is likely a landing page for a malicious download or exploit. The heuristic findings strongly indicate a malicious intent to lure users to external resources.

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/mathep-game-hack
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/roblox-hack-unlimited-robux_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/minecraft-bedrock-free-server-hosting_GM479516143.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-coins-for-coin-master-blogger_GM406889139.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/how-to-get-free-robux-with-a-fake-card_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/minecraft-free-play-now_GM479516143.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/legit-free-spins-coin-master_GM406889139.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/roblox-jailbreak-hack-download_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/minecraft-hacked-client-112-2_GM479516143.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/old-roblox-accounts-for-free_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/minecraft-free-download-windows_GM479516143.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/sites-for-free-spins-for-coin-master_GM406889139.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-robux-not-fake_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/how-to-get-unlimited-robux-with-cheat-engine_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/coin-master-hack-spins-free_GM406889139.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/minecraft-apk-114-4_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e5c.bin
f535adff0a9be19e549f6e5563ac51d221b2927d271cedae46f845ea1beb0075		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5C 22080 bytes
font_01_sfnt_off00005f42.bin
49092de834d3f8fc0161edca5c8ffc9035116622ffbf8cd5420aeadd749a8349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F42 18544 bytes

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