Malicious PDF — malware analysis report

Static analysis result for SHA-256 028d840515ea595c…

MALICIOUS

PDF

36.5 KB Created: 2021-05-24 18:44:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fd93aed4361d66bfb7d33c68cd86b1cf SHA-1: 88e3369c60c8716c1ad7da2bf248741cb4b2e8eb SHA-256: 028d840515ea595c6a9310d2aef9e83ca2dec0c647ea9ecf10e37988a9c972c2
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 0.9492

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/how-do-you-get-free-robux-game-hack PDF link annotation
    • http://www.sassrl.net/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.sassrl.net/images/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://www.sassrl.net/images/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • http://www.sassrl.net/images/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.sassrl.net/images/free-robux-generator-2021_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
stream_002_off000030d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30D4 25748 bytes
SHA-256: 9ee68f1551cd56790e4e346f1196aab752714f26c07ee4381a926028dc1b1cd9
font_01_sfnt_off00006c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C26 18612 bytes
SHA-256: 37b0398febc23a1417b5642eaebf6c5e0b941c8fdaeae9a9e3ba89062b3e12f9

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