Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fbdbac785d93c12…

MALICIOUS

PDF

38.0 KB Created: 2021-05-23 12:04:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 762b5c1393f3938930ddf28660d34940 SHA-1: 6a8af241a025c0f8c37154259dfaa45b04314279 SHA-256: 9fbdbac785d93c12c67a6fa55349ad97908db5687f2fee792223c0cda769d272
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 0.9407

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/get-free-robux-game-hack PDF link annotation
    • https://alarmed.pl/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://alarmed.pl/images/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/free-flip-master-coins_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_off0000354e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x354E 27136 bytes
SHA-256: 22c297fffa93331ca824c0e62660e9461d72226aed4c691ef2e7ae8d55816dfe
font_01_sfnt_off000073bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73BD 18120 bytes
SHA-256: 79ac164380d838bf2943c127f808202d45f8751c05dbd036140e6fb9b1b49848

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