Malicious PDF — malware analysis report

Static analysis result for SHA-256 611efdec5d74f1c9…

MALICIOUS

PDF

36.2 KB Created: 2021-05-23 05:44:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9568c7e96ff6f68ee9d4b7e018ec87f6 SHA-1: ab84550823fb19e03ee51bda071151b69a8102fe SHA-256: 611efdec5d74f1c9f3b2164751a7ee7feb4d3462588b6d01f873bea16cd9eb1e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for "free Robux" and "game hack" generators, directing users to external URLs. The presence of embedded links and the document's content strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a malicious intent to redirect users to potentially harmful content.

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/earn-free-robux-for-roblox-game-hack PDF link annotation
    • http://xn--80aciiv6azczc.xn--p1ai/images/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/how-much-pokemon-go-free-today_GM1094591345.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/coin-master-free-daily-spins-link_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_off000032ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32BA 24920 bytes
SHA-256: 6fc7c8b647da2dd5aae4aa48d7cd772699af1cdf446d6434becefa61bb96c9a9
font_01_sfnt_off00006c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C13 18316 bytes
SHA-256: 81577c12f28394e63c3fe269139937f952c5f2f271c4ac7315843a65914bc4b9

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