Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac392b1723eac90…

MALICIOUS

PDF

44.0 KB Created: 2021-05-14 13:48:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d0fc73ee3ff9ea4ff6ed76712e1508a5 SHA-1: 1b7de0339477f231abdb4d08898ce2372786ca83 SHA-256: 2ac392b1723eac90b7d174a7dea9f1782c47bfe5dec3239119000d15f44054b2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links and a call-to-action phrase, strongly suggesting a phishing or scam attempt. The document body and extracted URLs explicitly mention 'free Robux' and 'Coin Master spins', indicating a lure for game-related cheats or hacks. The presence of a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, further supports the malicious intent to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/how-to-get-free-robux-no-verification-game-hack
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-hack-app-download-free_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/free-pet-treats-coin-master_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/free-robux-come_GM431946152.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-hacks-and-cheats_GM431946152.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-com-hack_GM431946152.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/can-i-download-minecraft-for-free_GM479516143.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/cheats-for-coin-master_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/minecraft-diamond-finder-hack_GM479516143.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/minecraft-toys-for-free_GM479516143.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/cheat-codes-for-coin-master_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-download-minecraft-for-free-ios_GM479516143.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/robux-free-co_GM431946152.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-hacks-that-work_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e72.bin
f0ea48ab332bc6987227affbee56a794f9f4530e139a0c0c8fbb5c5110cee7ce		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E72 25028 bytes
font_01_sfnt_off0000884e.bin
a0d8f559ae1a84b7fc559fdee6dca3899797d6ff6e3d64572866459a8961df23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x884E 18764 bytes

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