Malicious PDF — malware analysis report

Static analysis result for SHA-256 75272105cc396cf3…

MALICIOUS

PDF

40.2 KB Created: 2021-05-22 05:14:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f9f4cbe972d338c89a73a15a42c382dd SHA-1: 92b5503c6ab70338da8289aba009e87eb5058f80 SHA-256: 75272105cc396cf3d4c1e0464d174c0f5830f5d4de437a4d7dc196fc22449f16
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 0.9476

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/free-roblox-accounts-with-robux-that-work-not-banned-game-hack PDF link annotation
    • http://lechia-sedziszow.pl/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/minecraft-hack-download_GM479516143.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_off00003601.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3601 29192 bytes
SHA-256: aa94497deb24844458c1403afac716f488bd5e864da4c514a48ddbae22155214
font_01_sfnt_off00007963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7963 19248 bytes
SHA-256: efa3c9b2c8f55d2ce8a78f8ae751aa117ac14b1934403b15023fd1527a527783

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