Malicious PDF — malware analysis report

Static analysis result for SHA-256 f425e5aa198c15b5…

MALICIOUS

PDF

39.0 KB Created: 2021-05-22 06:06:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fc3e964ec183c515031d19fda709321e SHA-1: f54c4f171bf42a98190073be08583cd5bcfedd4d SHA-256: f425e5aa198c15b5fa40e527b42c11ae8ed5210682a3a5c66e230d0e145987ba
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document displays a fake CAPTCHA, a common lure to trick users into interacting with malicious content. It contains an embedded URI pointing to a suspicious URL, likely intended to deliver a payload or redirect to a phishing site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 4

  • 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/479516143/free-minecraft-account-and-password-game-hack
    • http://www.donjastubica.hr/files/roblox-free-hair-codes_GM431946152.pdf
    • http://www.donjastubica.hr/files/rbxoffer-com-free-robux_GM431946152.pdf
    • https://www.donjastubica.hr/files/free-spins-coinmaster_GM406889139.pdf
    • http://www.donjastubica.hr/files/coin-master-hacking-news_GM406889139.pdf
    • http://www.donjastubica.hr/files/free-spins-coin-master-links-twitter_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003373.bin
6c0713ac08832d9d3e9edcebe1ed4144d70da3f4708f298944215a95273a51ee		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3373 25360 bytes
font_01_sfnt_off00006cbe.bin
8c5d9bcb386d88c7f99323d8d482e46ea21dea038a5b842744dd5d39b26b2c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBE 2856 bytes
font_02_sfnt_off00007694.bin
071cc331fbe0dfc1a6c0e7c1f1383f87707aabc4deba919dc9b38235f2b9b975		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7694 18344 bytes

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