Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48665b9c5e41032…

MALICIOUS

PDF

44.5 KB Created: 2021-05-14 04:00:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5d27a36d0b03bfcd5f9f0944ee5045e7 SHA-1: 7542a4f596e6e83de8a34c86b62dc01cbed6de76 SHA-256: d48665b9c5e41032d3ab8e72fc7c854c504850573194dbb3daaf2588586a73fa
62 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a visual download lure, directing users to download a file from a suspicious domain. The document body, though heavily corrupted, suggests a lure for 'Free Robux' and includes callback phishing elements, indicating a social engineering attempt to trick users into downloading a payload. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.xyz/app/431946152/free-robux-no-verification-or-survey-2021-game-hack
    • http://mohacad.hu/images/roblox-free-robux-com_GM431946152.pdf
    • http://mohacad.hu/images/free-coins-coin-master-blog_GM406889139.pdf
    • http://mohacad.hu/images/how-to-log-out-of-coin-master_GM406889139.pdf
    • http://mohacad.hu/images/free-roblox-codes-2021_GM431946152.pdf
    • http://mohacad.hu/images/coin-master-hacks-that-actually-work_GM406889139.pdf
    • http://mohacad.hu/images/free-robux-2021-no-verification_GM431946152.pdf
    • http://mohacad.hu/images/tower-of-hell-roblox-hack_GM431946152.pdf
    • http://mohacad.hu/images/best-roblox-hacks_GM431946152.pdf
    • http://mohacad.hu/images/free-spins-coin-master-november-2021_GM406889139.pdf
    • http://mohacad.hu/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://mohacad.hu/images/free-minecraft-capes_GM479516143.pdf
    • http://mohacad.hu/images/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdf
    • http://mohacad.hu/images/coin-master-free-spins-android_GM406889139.pdf
    • http://mohacad.hu/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • http://mohacad.hu/images/rbxoffers-com-free-robux_GM431946152.pdf
    • http://mohacad.hu/images/minecraft-nintendo-switch-digital-code-free_GM479516143.pdf
    • http://mohacad.hu/images/coin-master-unlimited-spin-hack-apk_GM406889139.pdf
    • http://mohacad.hu/images/free-online-minecraft-server_GM479516143.pdf
    • http://mohacad.hu/images/free-roblox-templates_GM431946152.pdf
    • http://mohacad.hu/images/free-robux-no-downloading-apps_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aab.bin
a06a6e4ab550a4ab8d384e4c41d53033cbdcccbcc88fef76b6d651f02c2a8b5f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AAB 28244 bytes
font_01_sfnt_off0000886c.bin
8ae3a64377bb3499e06ef2dc6ba5ce98d8bac2a4cf46517fa6b68a3eec67b541		 pdf-font-stream PDF embedded font (sfnt) at offset 0x886C 19296 bytes

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