Malicious PDF — malware analysis report

Static analysis result for SHA-256 6420d939d1e796ac…

MALICIOUS

PDF

33.2 KB Created: 2021-07-20 07:32:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 00d8414c456f029991f73d218c1f18a8 SHA-1: 12827ed27c151e4e1ffeb812e7c48b69b18faa39 SHA-256: 6420d939d1e796ac70ef8ebdc3191c8550c83d8478f6ff210bacb42bd69e86f1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 4

  • 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.
  • 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/free-robux-no-human-verification-no-survey-game-hack PDF link annotation
    • https://www.littlerockholidayresort.co.za/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/get-free-robux-com_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_off00002ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ADE 22316 bytes
SHA-256: fed9f6ba10faf06fbde8cc7926fd2af54c8cedd9bad001d707d01859fc8a3090
font_01_sfnt_off00005ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA0 19340 bytes
SHA-256: eb1e8621334ed51a94bbc255bf386eec5599657d3bf0a8f729de6b7a7c130168

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