Malicious PDF — malware analysis report

Static analysis result for SHA-256 285e0108e399a04c…

MALICIOUS

PDF

33.5 KB Created: 2021-06-18 06:06:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cb0565115fc93ef8dd8a839ef66c24da SHA-1: 2cf31a68dbf21d931bc1f0000031388f8020ce6f SHA-256: 285e0108e399a04cf8d40e2a23abdf6c3ace9ce883649d0bf2b8120c16d1972e
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are SEO-optimized and point to pages offering game hacks and free in-game currency, such as for Roblox and Coin Master. The presence of a "download" button lure and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting these links, likely leading to malware downloads or further phishing attempts.

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/hack-bunny-hollie-roblox-account-game-hack
    • http://schmittmusic.de/images/free-spins-coin-master-links-blogspot_GM406889139.pdf
    • http://schmittmusic.de/images/games-like-minecraft-but-free_GM479516143.pdf
    • http://schmittmusic.de/images/free-robux-thumbnail_GM431946152.pdf
    • http://schmittmusic.de/images/claim-free-robux_GM431946152.pdf
    • http://schmittmusic.de/images/roblox-gift-card-online-free_GM431946152.pdf
    • http://schmittmusic.de/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • http://schmittmusic.de/images/haktuts-coin-master-free-spins_GM406889139.pdf
    • http://schmittmusic.de/images/free-robux-no-verification-2021-android_GM431946152.pdf
    • http://schmittmusic.de/images/free-robux-2021-wiki_GM431946152.pdf
    • http://schmittmusic.de/images/coin-master-hack-apk-ios_GM406889139.pdf
    • http://schmittmusic.de/images/coin-master-link_GM406889139.pdf
    • http://schmittmusic.de/images/roblox-studio-free-online_GM431946152.pdf
    • http://schmittmusic.de/images/roblox-hack-client_GM431946152.pdf
    • http://schmittmusic.de/images/free-tiktok-likes-2021_GM835599320.pdf
    • http://schmittmusic.de/images/free-promo-codes-roblox_GM431946152.pdf
    • http://schmittmusic.de/images/how-to-play-roblox-for-free_GM431946152.pdf
    • http://schmittmusic.de/images/bux-gg-roblox-free-robux_GM431946152.pdf
    • http://schmittmusic.de/images/coin-master-free-spins-hacktman_GM406889139.pdf
    • http://schmittmusic.de/images/earn-free-robux-on-roblox_GM431946152.pdf
    • http://schmittmusic.de/images/minecraft-bedrock-server-hosting-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002da1.bin
5bee8ce02a8a1332aaddae786f17bd3c3fec0997546c7e9284cef181f0979702
pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA1 21836 bytes
font_01_sfnt_off00005daa.bin
21021dd2d724d5cf1a92b986521a65353c90996d8d012602beb9d28e12f39583
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAA 19012 bytes