Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e8b978b5f16340…

MALICIOUS

PDF

35.6 KB Created: 2021-05-21 16:54:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 93b80f1a7ce09cb71abc73316f185530 SHA-1: 25934c35747854334b8c61ec3e2af6f21ad68fd4 SHA-256: c7e8b978b5f1634038efda326637230dcea7863758a9d8f74af06134fa8301bd
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/835599320/free-tiktok-accounts-with-2021-fans-game-hack PDF link annotation
    • https://www.stayon.no/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/how-to-actually-get-free-robux_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_off0000325d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x325D 23944 bytes
SHA-256: dd6e7daca0950f742f431c597f5ddf98e59a934dc02a38c63a5772297f335d99
font_01_sfnt_off000068fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FD 18592 bytes
SHA-256: 3ad04ff0b16d11a4fdfe19cf9104e227be60a51d38f73174fb91ff48ee4b9c9e

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