Malicious PDF — malware analysis report

Static analysis result for SHA-256 eccd0eb6dae94a66…

MALICIOUS

PDF

45.2 KB Created: 2021-06-14 00:21:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f195ee3135828d3ea3bc359c6210ec37 SHA-1: 14ad0815d6838af00fa8aeed1b5842561a13aaa6 SHA-256: eccd0eb6dae94a6672a00a9413555fad0a3f554a5e3aa41cb30e27723464f354
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick the user into executing a malicious file, as indicated by the 'SE_FAKE_CAPTCHA' heuristic. It also contains an external URI pointing to a potential download, which is a common tactic for malware distribution. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-reversed-reality-hack-game-hack PDF link annotation
    • https://deutsch-study.com/image/data/files/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/toolbox-mod_GM479516143.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/roblox-blockburg-money-hack-penquin-script_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/simplysarc_GM479516143.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-you-get-robux_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-coin-app_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/roblox-huge-field-fre_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a1c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1C 28924 bytes
SHA-256: ab2699ec2d28820a3ca1f7fc9b9efd88ad82131f8dcff498222b7fc218055b4a
font_01_sfnt_off00008cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC5 18872 bytes
SHA-256: 0eec23cfa04103f216526777a49f2429a247bd39ef84b2985918bb068ac7a9dd

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