Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67b93905f9865db…

MALICIOUS

PDF

45.0 KB Created: 2021-05-16 18:26:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b6740f17a96d82ff136b925912f48020 SHA-1: 1b917e97ae511308d7b210509ae4dbc6c27a540e SHA-256: b67b93905f9865db55325a32fa351c8f8fba4082a6e86d1802256f69dabbf86c
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a link. This is a common lure for phishing or malware distribution. The embedded URL points to a resource likely intended to deliver a second-stage payload.

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 https://netcdn.xyz/app/431946152/roblox-robux-generator-http-freerobuxgenerator-xyz-game-hack PDF link annotation
    • http://dieter-sauter.com/images/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/robux-offers_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/rbx-website_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/complete-offers-for-robux_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_off00004bcc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BCC 29012 bytes
SHA-256: 65e2576bd161d4cf751f740dffffe2d2490da8ac70510f849a72e7151919d77b
font_01_sfnt_off00008b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B14 19148 bytes
SHA-256: ca12ce3d7dfc1e8f594ff16b8d50f9174b7c57a2d485e52127105fd2973060c9

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