Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e345317bad4585…

MALICIOUS

PDF

38.0 KB Created: 2021-05-25 10:06:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b6bb34258af14fa203cba28b0b65267f SHA-1: 1d043e21ab23eaf2d32a950d6f058032b0263f92 SHA-256: 03e345317bad458541ec3cd27c10b04f6a4856dbc34a9e60c333eeb51c5df2e5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and text lures related to 'free Robux' and game hacks, directing users to external URLs. The ML classifier also flagged this PDF as malicious. The presence of these lures suggests a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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/free-robux-redeem-codes-game-hack PDF link annotation
    • http://innovativefs.co.uk/images/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/login-robux_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/bux-life-free-robux_GM431946152.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
font_00_sfnt_off000033ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33FF 27616 bytes
SHA-256: 5c3b1eb7f3ebaeef4dc54f5907118083cbf0136fbf46e11dda614b4dad34c6c6
font_01_sfnt_off000072bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72BD 18448 bytes
SHA-256: ac1fbd71dc65d7a5013a2beb110170fe519d7ae17df877d161357825f85fd2ae

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