Malicious PDF — malware analysis report

Static analysis result for SHA-256 6648596b20ca764a…

MALICIOUS

PDF

33.3 KB Created: 2021-06-26 00:14:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8ae682222e89e247356be3460c061ee1 SHA-1: 2a972293a1db76a4c184e550fa84d32b794710e0 SHA-256: 6648596b20ca764a636db3f6a3d9894ef4ad870b1f68f028a37efcd59279bc54
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of embedded links, many pointing to IP addresses, that are designed to appear as guides or downloads for popular games like Roblox and Minecraft. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm or SEO poisoning tactic. The ML classifier also flagged the PDF as malicious. The presence of download-related text and numerous links to game cheats and free currency generators indicates a lure for potentially unwanted applications or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/robux-free-tips-apk-game-hack PDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/2021-how-to-free-admin-commands-to-your-roblox-gane_GM431946152.pdfPDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux-generator-no-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-free-airpods-tiktok_GM835599320.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/cheat-engine-bypass-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-free-name-change_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux-without-downloading-apps_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_off00002aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AEA 22484 bytes
SHA-256: fc4437bf8cce9ec27bc84bae5ce066f1e4f3095f5f1524fb66edbb551ff3b72d
font_01_sfnt_off00005d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D43 19180 bytes
SHA-256: d364bcadfa832a56ec0c279f937c9220cb6671de3fb9f67d9c7ca49b1cd01830

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