Malicious PDF — malware analysis report

Static analysis result for SHA-256 409784b4c27df0c7…

MALICIOUS

PDF

40.8 KB Created: 2021-05-10 13:15:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9939ac3580c948f40ca22afe5cd3068f SHA-1: 187324993b7f0ae7c3057f6be9fe211d1e7a4817 SHA-256: 409784b4c27df0c767f40de4234d6ea78312fdca80095c469c3da4ecb7f5a9d8
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 0.8971

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/479516143/minecraft-bedrock-edition-pc-free-game-hack PDF link annotation
    • http://nebraskahospitalityhalloffame.com/images/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000039b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x39B5 24812 bytes
SHA-256: 138ad597b2bc636d23a43661a6104c6712e1f7fc1eced7ef3038d3dce6082275
font_01_sfnt_off00007306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7306 3056 bytes
SHA-256: dd24a0ab94df4552e459bd06fd01b0fd3f021c1d51d1d64407070e735974a028
font_02_sfnt_off00007d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D78 18424 bytes
SHA-256: b5a3fec1d7f3ae012b17f1950b72f1e02224ae7313c4d9c9d68c8b40b26cb064

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