Malicious PDF — malware analysis report

Static analysis result for SHA-256 2236b62c7c38f471…

MALICIOUS

PDF

40.7 KB Created: 2021-05-18 03:07:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e34aaaebbb6712539c8c0b6e1a3d2e34 SHA-1: 96b6b57d016dc6884694518b655b78417152c725 SHA-256: 2236b62c7c38f47158fc47be0072b76673bb98709d6da40633fbbaec96bea3e6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that explicitly promises free Robux and game hacks, acting as a lure. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, likely to further phishing or malware distribution sites. The ML_NYX_PDF_MALICIOUS score of 0.997 confirms the high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/free-robux-script-game-hack PDF link annotation
    • http://webstan.be/images/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/roblox-person_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/coin-master-free-spins-hack-download_GM406889139.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
font_00_sfnt_off00004641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4641 23760 bytes
SHA-256: 324304d834669320fbb3b2215114b9ae7ac2d5e0dcb35617e16135efe0662126
font_01_sfnt_off00007c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C37 18416 bytes
SHA-256: 7904477eb6282cb79bb1f8d95588be1a5283b3abf5667e30a4d761915d4b26ef

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