Malicious PDF — malware analysis report

Static analysis result for SHA-256 3752f5a5d9cd8c0e…

MALICIOUS

PDF

47.1 KB Created: 2021-06-03 09:31:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2981b26039c17a038e23ff2f966cc752 SHA-1: 78bb132a68b59b79b5173911e3289033bf77fe05 SHA-256: 3752f5a5d9cd8c0ea832eb0d4ae4b336bac7e8075fd6cb985d78c192aae8145c
122 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious lure, employing a link farm to obscure the true destination of external links. The document body and extracted URLs suggest an attempt to trick users into downloading game hacks or cheats, which is a common pretext for malware delivery. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/406889139/mcpe-master-hack-coins-game-hack
    • http://pustaka-smpn3tpi.com//repository/how-to-hack-coin-master-spin_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-32-hack-apk_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/free-spin-and-daily-news-coin-master_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/coin-master-spins_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/show-me-how-to-get-free-robux_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/hack-coin-master-apk-mod_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/how-to-play-minecraft-online-for-free_GM479516143.pdf
    • http://pustaka-smpn3tpi.com/repository/master-8-ball-pool-free-coins_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-ios-2021_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-code-for-free-spins_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-snacks-in-coin-master_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-tiradas-gratis_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/wurst-client-112-2_GM479516143.pdf
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-tool-download_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/has-my-roblox-account-been-hacked_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/how-to-get-robux-on-phone_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/free-spin-and-coin-blogspot-com_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/coin-master-daily-free-link_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/i-want-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000526b.bin
cd2e1e3a815fd4d94c83daf58fb590b5331dcb6b46fee4c383b3326c640e272f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x526B 25148 bytes
font_01_sfnt_off00008caf.bin
30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAF 2840 bytes
font_02_sfnt_off00009661.bin
0c63e033d5ffe887ffec85b5cafaf72e8c864209b86636c790ff2846ce341ff6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9661 17892 bytes

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