Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da5174b5bc0d148…

MALICIOUS

PDF

45.2 KB Created: 2021-05-12 15:07:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1a673c3ba0e1d816dde844e905ff0daf SHA-1: a72bc2319fa68a9a6115c81a845f6ab6276121ff SHA-256: 9da5174b5bc0d148ce52206715aa8a60b037cb5061ccd4e6e9948d90df830db6
102 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many of which are SEO-optimized and point to game-related hacks and cheats. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document's structure suggests it's part of a link farm designed to attract users searching for cheats and exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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 https://netcdn.xyz/app/406889139/coin-master-free-spins-no-survey-game-hack
    • https://pt-mataram.go.id/perpustakaan/repository/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/minecraft-pe-hacks-2021_GM479516143.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/hack-coin-master-for-free_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/aimbot-download-roblox_GM431946152.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/free-robux-without-any-verification_GM431946152.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/minecraft-free-download-android-apk-014-0_GM479516143.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-hack-and-get-free-robux_GM431946152.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/free-shields-coin-master_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/i-need-more-free-spins-on-coin-master_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-hack-online-without-human-verification_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/free-roebucks_GM431946152.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-spins-2021_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-minecraft-java-for-free_GM479516143.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/free-spins-coin-master-links-2021_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-hack-fast-org_GM406889139.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-free-clothing-on-roblox_GM431946152.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-free-robux-on-computer_GM431946152.pdf
    • https://pt-mataram.go.id/perpustakaan/repository/how-do-you-get-robux-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bd9.bin
5f32e3ad4b7a97f206d8ef32b5314e7d5a95df376c3f96241ea0a8d612ec462a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD9 24600 bytes
font_01_sfnt_off00008421.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8421 2840 bytes
font_02_sfnt_off00008dd2.bin
8f8c071623a7703d27897fee0415069e7501bbca86f42ef797abe0a074016bd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD2 18320 bytes

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