Malicious PDF — malware analysis report

Static analysis result for SHA-256 c561047f4ed3bc8c…

MALICIOUS

PDF

40.9 KB Created: 2021-05-12 15:16:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 246f76749457502b1c58069e80a1ae16 SHA-1: 524a29db9b390f58ebf9be686049eed475ee7ff8 SHA-256: c561047f4ed3bc8ca51766a72c13f973a3bd67d6ff96da5aef406223427fa3e3
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick the user into executing a downloaded file. The embedded URL points to a potential second-stage payload. The document's content and heuristics strongly suggest a phishing or social engineering attack aimed at tricking users into downloading and running malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/mcpe-master-hack-coins-game-hack PDF link annotation
    • http://www.boic.nl/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.boic.nl/images/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://www.boic.nl/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://www.boic.nl/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/coin-free-master_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/robux-claimer_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_off00004732.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4732 24368 bytes
SHA-256: 3eea92df5fbfc76d460766149d2468f8cb8713439633404996c45d81f073b57a
font_01_sfnt_off00007e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E94 17892 bytes
SHA-256: 0c63e033d5ffe887ffec85b5cafaf72e8c864209b86636c790ff2846ce341ff6

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