Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d37e8b8fae23b6…

MALICIOUS

PDF

39.2 KB Created: 2021-05-22 00:22:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: aa0232a57cc261cbed8fb02858d29abe SHA-1: eab7f06a59bf5c3e16fb05a786c85a3b670982b6 SHA-256: 38d37e8b8fae23b6b08a7b1d611b75248dd119ea7ab00afcfc80c8331087f032
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 0.8068

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 https://netcdn.xyz/app/431946152/robux-hack-game-hack PDF link annotation
    • https://www.omgtours.com/images/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • https://www.omgtours.com/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://www.omgtours.com/images/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.omgtours.com/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.omgtours.com/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31C4 25444 bytes
SHA-256: 7efaccf309a89e99f7182cd8edd11c8fe107f7df0a2f2517d2f7264f570912c5
font_01_sfnt_off00006c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8D 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off000077b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B6 18248 bytes
SHA-256: dc70545b78036d2d989a53e60713ee6b6ba72604799932bb5b2fc13357d7a02a

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