Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95073e2642edbd0…

MALICIOUS

PDF

42.2 KB Created: 2021-05-19 01:32:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e2730186b88f8d5a57575d11692f5eed SHA-1: 40831d8d116cddc1bcc99d1fb11660d173d83565 SHA-256: c95073e2642edbd079069c83e1be724a51253e0a85abeeecb0c4c97a9930586e
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, suggesting it is designed to redirect users to external sites. The document body and heuristics indicate a lure for free game codes and items, which is a common tactic for distributing malware. The presence of a 'password-protected archive' lure suggests an attempt to bypass security scanning by encrypting the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-roblox-toy-codes-2021-game-hack
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-coin-coin-master_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-spins-8-14-2021_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/robux-hack-free-robux_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-spin-card-exchange-coin-master_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-game-hack-app-download_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/pokemon-go-free-unblocked_GM1094591345.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-do-you-get-free-roblox_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-cracked-apk-free-download_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/no-verification-coin-master-hack_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-box_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-can-i-get-free-robux_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-hack-tool-no-survey_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-no-password_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-spins-hack_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-by-watching-ads_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-20-free-spins-link-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004850.bin
5560b555ff3393e3fc6fb25e2f94cd3edf8e3f44fbbbf9a679a4a967781ed4b8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4850 24604 bytes
font_01_sfnt_off0000810d.bin
310b0eb167ed5acb3e0393954d8d7f46b13cc3d4732db83d1204f458420b6348		 pdf-font-stream PDF embedded font (sfnt) at offset 0x810D 18704 bytes

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