Malicious PDF — malware analysis report

Static analysis result for SHA-256 64fe468df2fd7deb…

MALICIOUS

PDF

44.0 KB Created: 2021-05-20 13:32:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a7a36404cbb41dd23cd7bdec71b46827 SHA-1: 13c18cd730c23fa60e7c99e97022caa99c48fea5 SHA-256: 64fe468df2fd7debbf0191581f301b7b1b04cc3d625e8acec1499c0ef268f4ba
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 0.9538

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-to-get-free-robux-instantly-game-hack PDF link annotation
    • http://www.sovtigaz.ru/f/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coins-master_GM406889139.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_off0000347e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x347E 38808 bytes
SHA-256: 00ebcf92289859e65bd6b6addc4786df817dc380d89470582db4df310b7fd97f
font_01_sfnt_off000089b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B3 18764 bytes
SHA-256: 19eb0a1aeef998e7db468722215b94b9b4bc3d0fba007f3cca2c49ee7cc94cee

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