Malicious PDF — malware analysis report

Static analysis result for SHA-256 044ddb258d5aa991…

MALICIOUS

PDF

45.0 KB Created: 2021-05-13 13:32:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dbc6f2a2c5cdd9f5a6652653586e9281 SHA-1: 5637cfcade55b93dced195b4af0522b19f43753f SHA-256: 044ddb258d5aa991d6e328dda009327da6ab1dcbc2d539e2bec7d91e22f6aa01
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick the user into clicking a link and downloading a payload. The embedded URL, https://netcdn.xyz/app/431946152/roblox-arsenal-hacks-download-game-hack, likely hosts this secondary malicious content. While no scripts were directly extracted, the PDF structure and ML classifier strongly indicate malicious intent, likely involving exploitation for client execution.

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/roblox-arsenal-hacks-download-game-hack PDF link annotation
    • http://ilifemarket.ru/images/www-rubux_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://ilifemarket.ru/images/blox-rewards_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://ilifemarket.ru/images/moonactive-free-spins-2021_GM406889139.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
stream_003_off00004879.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4879 25948 bytes
SHA-256: 67c9d4b1403311b48e34efdaffb698ebc0d5736da521bc60ab2ac3cc7b1f814a
font_01_sfnt_off00008212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8212 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB3 18688 bytes
SHA-256: 3194e743087210276cc8ef30afa20718d77c17967e4a232ddce90cfa751f40c3

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