Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1b56d7deceb644…

MALICIOUS

PDF

35.1 KB Created: 2021-06-20 09:53:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6e366682c6d8e6e1c2643baa8c96784c SHA-1: 145eae645fa58b5e67d0f100d9a09a8c99eeb1f5 SHA-256: 2c1b56d7deceb6447d67a3f5f9b9f460e1d6e8a7fab7190dc3eb97425f085e6a
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that form a link farm, likely intended to redirect users to malicious sites offering game cheats or accounts. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or malware distribution attempt.

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.co/app/431946152/how-to-make-a-free-account-on-roblox-game-hack
    • http://pustaka.fti.unand.ac.id//repository/free-minecraft-alt-accounts_GM479516143.pdf
    • http://pustaka.fti.unand.ac.id//repository/coin-master-hack-game-download_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/all-free-items-in-roblox_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/safe-mac-roblox-quto-clicker-free_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/what-do-roblox-points-do_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id//repository/coin-master-claim-free-spins_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id/repository/how-to-hack-roblox-prison-life-on-chromebook_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id//repository/how-to-hack-mcpe-master-coins_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id//repository/game-hunters-coin-master-free-spins_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id/repository/free-robux-glitch-2021_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-spins-glitch_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id/repository/free-spin-online-tool-coin-master_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id//repository/coin-master-free-spins-cash_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id/repository/haktuts-coin-master-free-spins_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id/repository/phantom-forces-roblox-rank-hack_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/how-to-cheat-on-you-roblox-girlfriend_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/is-minecraft-dungeons-free_GM479516143.pdf
    • http://pustaka.fti.unand.ac.id/repository/free-bloxburg-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031a7.bin
656eaf1b5c849fe072c1562e238f709be0bcea39f45e81c3c9446bd967c6af5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31A7 22320 bytes
font_01_sfnt_off0000632e.bin
45f0929cbfaa58806912e4cc20c98f43ce89908b8b45761347e2b168d205bbd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632E 19424 bytes

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