Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16112fabf455938…

MALICIOUS

PDF

43.1 KB Created: 2021-05-13 18:46:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 871bef7abdae5fe44eb5c1eb808d6113 SHA-1: 06652bc0437141e0793a584b1273aecbc498bb17 SHA-256: a16112fabf4559380b24be8315d1d0639c23b4c275066b68437b031f5491f451
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 interacting with malicious links. The embedded URLs, such as https://netcdn.xyz/app/431946152/lazyblocks-com-robux-game-hack, likely lead to the download of a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/lazyblocks-com-robux-game-hack PDF link annotation
    • http://agritrade-ukraine.com/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/rbx-claim_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/minecraft-free_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A8A 25296 bytes
SHA-256: 431033514428eefadaae7075df4d73a4377e86ee3a0a9557f9a7cc531beefe00
font_01_sfnt_off0000846a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x846A 18844 bytes
SHA-256: 639e5ac620987a890dc2290d0ce77fbe17994151dd0929aad8f87d767cce42ff

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