Malicious PDF — malware analysis report

Static analysis result for SHA-256 a41d2d97bf341bdd…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 08:36:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 940f223dc1fe9ab4713f0f18e83f3f3b SHA-1: ec6386a6653ee11c9d2fce5415d84ffa6ac3abff SHA-256: a41d2d97bf341bdd87062b2a9ee468558fd52c2e145b39cbf8f6e35e1ca13f0d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, forming a link farm, and a prominent call-to-action phrase suggesting a download. The primary URL, https://netcdn.online/app/431946152/free-robux-websites-that-work-game-hack, is likely intended to deliver a malicious payload. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/free-robux-websites-that-work-game-hack
    • http://pustaka1.unindra.id/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdf
    • http://pustaka1.unindra.id/repository/300-daily-free-spins-coin-master_GM406889139.pdf
    • http://pustaka1.unindra.id/repository/how-to-get-free-robux-fast_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/roblox-2021-hack_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/how-to-get-free-minecraft-coins_GM479516143.pdf
    • http://pustaka1.unindra.id/repository/coin-master-free-spins-and-coins-link-today_GM406889139.pdf
    • http://pustaka1.unindra.id/repository/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdf
    • http://pustaka1.unindra.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • http://pustaka1.unindra.id/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/cool-free-roblox-outfits_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/free-robux-app-real_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/roblox-redeem_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/roblox-robux-hack-generator_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/mcpe-master-coin-hack-apk_GM406889139.pdf
    • http://pustaka1.unindra.id/repository/500-free-spins-coin-master_GM406889139.pdf
    • http://pustaka1.unindra.id/repository/coin-master-hack-xyz_GM406889139.pdf
    • http://pustaka1.unindra.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://pustaka1.unindra.id/repository/village-coin_GM406889139.pdf
    • http://pustaka1.unindra.id/repository/redeem-roblox-card-free_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/coin-master-daily-free-spins-link-haktuts_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000506f.bin
c3012ccea55bc554c7970495af41a0c8690331d27a95ab524bb5e4e59bad0073		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x506F 25060 bytes
font_01_sfnt_off00008a67.bin
7385cf8e30761df55e83d9792ae8d47179260988159899b0069d718a962ca50a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A67 19000 bytes

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