Malicious PDF — malware analysis report

Static analysis result for SHA-256 472f0e38a9a435c2…

MALICIOUS

PDF

44.1 KB Created: 2021-05-12 15:57:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0d725b4f0add26c295c28452d436ce1f SHA-1: da1cb61138e6611b68267fca454f5b4f0cc893f9 SHA-256: 472f0e38a9a435c2d8f9147c6e2159fd22c84e7fdc79a7444c656cd6e7bc567d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to pages offering game hacks and rewards. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to game rewards and hack tools, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/microsoft-roblox-rewards-game-hack PDF link annotation
    • https://www.laarsenco.nl/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.laarsenco.nl/images/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • https://www.laarsenco.nl/images/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://www.laarsenco.nl/images/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • https://www.laarsenco.nl/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.laarsenco.nl/images/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • https://www.laarsenco.nl/images/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://www.laarsenco.nl/images/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • https://www.laarsenco.nl/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.laarsenco.nl/images/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.laarsenco.nl/images/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.laarsenco.nl/images/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.laarsenco.nl/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.laarsenco.nl/images/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • https://www.laarsenco.nl/images/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • https://www.laarsenco.nl/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.laarsenco.nl/images/minecraft-client-download_GM479516143.pdfIn PDF document text
    • https://www.laarsenco.nl/images/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • https://www.laarsenco.nl/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.laarsenco.nl/images/coin-master-apk-hacked-3526_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
stream_003_off00004b66.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B66 25996 bytes
SHA-256: 15a32c951dae7e426ecce79501f5f265b4ddc89ac9fd4ff750d3c2dbd0347682
font_01_sfnt_off00008845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8845 18772 bytes
SHA-256: 885cbd3f72e53b67117bb4048e91371d45fd893deaab7f6141eb78c54bb681fd

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