Malicious PDF — malware analysis report

Static analysis result for SHA-256 921c17c6a8d42575…

MALICIOUS

PDF

35.5 KB Created: 2021-05-20 16:01:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5e12a23eba8b835dfac9d3343e6f506b SHA-1: c624f320b6f598a0af974f398533e2801628f346 SHA-256: 921c17c6a8d4257530132d3bf95ecf8895cc857ace3864f28395766f2e93ebea
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to websites offering 'free game hacks' or generators, such as Robux. The primary lure is a link to 'robux-com-free-game-hack' on netcdn.xyz, which is likely intended to trick users into downloading malware or visiting a phishing site. The document body and heuristics confirm the presence of these lures and external URIs.

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/robux-com-free-game-hack PDF link annotation
    • http://reggieslockandkey.com/images/daily-spin_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f9b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F9B 25124 bytes
SHA-256: 2157a9fdb4973bc48ac79aa39e9811730a61419756e79725c39276320dc1d88a
font_01_sfnt_off000069a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A7 18276 bytes
SHA-256: 15a0db03ecad41b32ad15729058012b5ee1d917146ec7af3e780186d41394abc

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