Malicious PDF — malware analysis report

Static analysis result for SHA-256 e131e7e4918c5d7a…

MALICIOUS

PDF

33.9 KB Created: 2021-06-26 07:26:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2e000a735fdb18c4154ab364b8398ce2 SHA-1: d24e28e68478e4a830a4298955cc3b6044558479 SHA-256: e131e7e4918c5d7aa791780fdb3993d081fb1f4ad262c058bac1c6a8aad5d34b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a 'download button' lure, directing users to websites offering 'free Robux' or game hacks. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm or scam operation. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the document, likely intended to redirect users to phishing or malware-distributing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/how-do-you-get-free-robux-hack-game-hack PDF link annotation
    • http://www.nfca.org.tw/upload/files/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/can-you-still-make-free-roblox-shirts_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-free-dominus-code_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-find-out-who-hacked-you-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/http-wwwfree-robuxcom_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-knife-code-assasins-roblox_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-spawn-in-models-hack_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/fly-hack-download-roblox-2021-gameguardian_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-desktop-generator_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/pubg-uc-carding-method-2021_GM1330123889.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-without-any-verification-or-downloads-or-offers_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/tiktok-free-likes-app_GM835599320.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/hack-coin-master-game-apk_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_off00002b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B12 22864 bytes
SHA-256: 71cef85e2a3bbbffb895c10dc0e4f5c89977a83b21c85af9098c98cb20798d4a
font_01_sfnt_off00005e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4A 19484 bytes
SHA-256: 02af419d3f0a0a04813f69d7c372aea2f9b96eabd215a311f2e9f31958f10e44

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