Malicious PDF — malware analysis report

Static analysis result for SHA-256 335e13ba02f13b93…

MALICIOUS

PDF

34.3 KB Created: 2021-06-18 13:29:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aa7245c78a28a4ffcf3fa7481c46cc64 SHA-1: e0d79ab9015e43f96ac343b5807b4e326c1519fa SHA-256: 335e13ba02f13b93c94d0e03d0ba4edabcbe5abbdfb05f44fbe75c021310f6e4
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that link to sites offering game hacks and cheats, suggesting a lure for users to download malicious content. The heuristic firings, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, strongly indicate malicious intent. The presence of a 'download button' lure further supports the phishing or scam nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/baby-simulator-hack-roblox-game-hack PDF link annotation
    • http://medinup.pt/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/google-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-free-followers-on-tiktok-without-human-verification_GM835599320.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-fortune-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-how-to-get-obc-for-free_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/roblox-dragon-ball-after-future-hack_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/como-desbloquear-un-cuenta-hackeada-de-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/cheat-codes-for-roblox-candy-war-tycoon_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/make-free-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-download-free-online_GM431946152.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_off00002eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EED 22224 bytes
SHA-256: e4c70d326bcca77ae005d6b8b5105e643e1ca3dc88042e6637ed05181d7998af
font_01_sfnt_off0000604e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604E 19276 bytes
SHA-256: 5d1818fd6f354f9e32335718eb2a6649ecb00914fd0ffe706a6226b91c7b8cac

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