Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5fef4b759a75ad…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 16:26:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6d14c4d86ea12f56d028ee5f6114df83 SHA-1: 230757eabe174c25c0e00d84d95eb8ba293c599d SHA-256: fc5fef4b759a75ad277ea21b5cac9548d80e00d433ad07631e2297b179c13398
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external websites that promise game hacks and free currency for popular games. The ML classifier strongly indicated maliciousness, and the presence of game hack lures suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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.tw/app/431946152/can-i-have-robux-game-hack PDF link annotation
    • http://217.165.206.12/userfiles/files/minecraft-auto-miner-hack_GM479516143.pdfPDF link annotation
    • http://217.165.206.12/userfiles/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/pastebin-robux-promocode-hack-2021_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/roblox-make-shirt-price-free_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/hacks-injector-roblox_GM431946152.pdfIn PDF document text
    • http://217.165.206.12/userfiles/files/roblox-javascript-hack-pastebin_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_off00002fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB7 22588 bytes
SHA-256: ef715b8096d6389c45078f6090133fd9d01063c22e6ebec47a374ff60422e359
font_01_sfnt_off00006242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6242 18668 bytes
SHA-256: 1ae2abc7ddb7e11b0fef4f3892d9ba6710e883f112786b0bde5a806213b3f695

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