Malicious PDF — malware analysis report

Static analysis result for SHA-256 6659150a630b5923…

MALICIOUS

PDF

44.5 KB Created: 2021-05-16 09:36:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 363b2644415dc54e3d7931fe0cc19aa1 SHA-1: f2bf080a3718e35bac386e208cb698cf48d1ff93 SHA-256: 6659150a630b5923783a17698567380f6d06453209315fd23da443e05236b808
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links and a document body that attempts to lure users with promises of free in-game currency and cheats for popular games like Minecraft and Roblox. The heuristic firings indicate a link farm designed to distribute other PDFs, suggesting a multi-stage download or redirection scheme. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution campaign.

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 https://netcdn.xyz/app/431946152/free-robux-codes-no-verification-game-hack
    • http://www.emotional-training.com/storage/editor/files/minecraft-free-unblocked_GM479516143.pdf
    • http://www.emotional-training.com/storage/editor/files/free-mojang-account-with-minecraft_GM479516143.pdf
    • http://www.emotional-training.com/storage/editor/files/wurst-18_GM479516143.pdf
    • http://www.emotional-training.com/storage/editor/files/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • http://www.emotional-training.com/storage/editor/files/how-to-hack-someones-minecraft-account_GM479516143.pdf
    • http://www.emotional-training.com/storage/editor/files/coin-master-free-spins-blogspot_GM406889139.pdf
    • http://www.emotional-training.com/storage/editor/files/how-to-hack-mcpe-master-coins_GM406889139.pdf
    • http://www.emotional-training.com/storage/editor/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://www.emotional-training.com/storage/editor/files/roblox-robux-generator-tool_GM431946152.pdf
    • http://www.emotional-training.com/storage/editor/files/microsoft-roblox_GM431946152.pdf
    • http://www.emotional-training.com/storage/editor/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdf
    • http://www.emotional-training.com/storage/editor/files/easy-robux-hack_GM431946152.pdf
    • http://www.emotional-training.com/storage/editor/files/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://www.emotional-training.com/storage/editor/files/play-coin-master-for-free_GM406889139.pdf
    • http://www.emotional-training.com/storage/editor/files/free-coin-master-spins_GM406889139.pdf
    • http://www.emotional-training.com/storage/editor/files/how-to-get-free-robux-as-a-kid_GM431946152.pdf
    • http://www.emotional-training.com/storage/editor/files/minecraft-bedrock-edition-free_GM479516143.pdf
    • http://www.emotional-training.com/storage/editor/files/free-robux-websites-2021_GM431946152.pdf
    • http://www.emotional-training.com/storage/editor/files/coin-master-free-attack-hack_GM406889139.pdf
    • http://www.emotional-training.com/storage/editor/files/free-spins-coin-master-cheat_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cb3.bin
5c4e201150a7eb61c246eb99d469ee46f457654a28f0ca85e970ee3bec150336		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CB3 26792 bytes
font_01_sfnt_off00008a00.bin
1501cc25bcf8c3b3bf9df14f68216c1cc39cc5b0131e4343b63bafa21afb9c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A00 18776 bytes

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