Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0580dd746c29566…

MALICIOUS

PDF

44.3 KB Created: 2021-05-15 05:30:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 67b23bc4924e0d153a479436b07ec56c SHA-1: 0b5dfab369f4c0da6d184eb13b664652b19dff06 SHA-256: d0580dd746c29566a7eb8e8d5941d03e44ed6a6b59c43ba74893afeee8e5c8c9
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. It also exhibits characteristics of a link farm, with numerous external URLs pointing to potentially scam-related content. The ML classifier strongly indicated maliciousness, supporting the observed social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-do-u-get-free-robux-2021-game-hack
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/hack-coin-master-apk-32-download_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-blogspot_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-level-3_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-do-you-get-roblox-money_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/robux-download_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-real-2021_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-use-wurst_GM479516143.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/ways-to-earn-robux_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/blox-world-free-robux_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/robux-in_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/hack-coin-master-net_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-spin-coin-master-online_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/robux-generator-no-human-verification_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-spins-on-coin-master_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-can-you-get-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004819.bin
02e3bc0bbe9b952aedc0f15a08740cff8b722eee875fabad3627d44028bc817c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4819 27972 bytes
font_01_sfnt_off0000887b.bin
14ed63897d8c38c9b74f4ae6c685ddc963b8153977262fdb6411d06658c720a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x887B 19040 bytes

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