Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac52ed101d9febf8…

MALICIOUS

PDF

44.6 KB Created: 2021-05-19 20:43:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e792ac041079948756ec15d198fec1f6 SHA-1: ad72547b8abb28acc5d97447fb06c67faf85d90a SHA-256: ac52ed101d9febf8d9e63065d8e03f796b9d1051c33cb22ba473491383c94cbc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA or human verification prompt to trick the user into interacting with it, likely to download a secondary payload from the embedded URL. The ML classifier also flagged this PDF as malicious with high confidence. The presence of multiple URLs suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/how-to-get-more-robux-game-hack PDF link annotation
    • http://practicaltech.com/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://practicaltech.com/images/coin-master-new-link-free-spin_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/how-to-get-free-pokeballs-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://practicaltech.com/images/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://practicaltech.com/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46DA 25720 bytes
SHA-256: 85cfb8ca8a47ba65c0374347439c90628239ecb4724a47842f95309beea1c005
font_01_sfnt_off000081d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D7 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off00008b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8D 18312 bytes
SHA-256: b63754bab8a539e11eebb32f86c31dbe9ceb60be690df901f3a3ba32c84f6f1e

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