Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fcdb492af6f66fe…

MALICIOUS

PDF

36.4 KB Created: 2021-05-25 07:03:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f264bc2bf12da5e462fc25042264d29a SHA-1: d903b0ee1edb8977ba3b077c740d56d8b7859b3d SHA-256: 9fcdb492af6f66fe4e3834823d2f2da506408d3363f2e5eb16c00d1617437ddf
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/free-robux-cards-game-hack PDF link annotation
    • http://magnipsor.su/images/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://magnipsor.su/images/gain-robux_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/master-coin-free-spin_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_off00003320.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3320 25652 bytes
SHA-256: 3d9f46234bc2421c4cf36530aff4c1ddd1f2ab52b6ac3a66f78cfb6204e8cf1a
font_01_sfnt_off00006c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C73 18416 bytes
SHA-256: 79c56a0f23d4fc34690a575a065be14b64911c3c5a3331038291264b4b7107af

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