Malicious PDF — malware analysis report

Static analysis result for SHA-256 77dda84ae22488fb…

MALICIOUS

PDF

45.5 KB Created: 2021-05-10 14:36:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a715014902a0e2a672f3a7555a2a9058 SHA-1: 654f827280b3acbeccb04a2f45585aa8ab56ca53 SHA-256: 77dda84ae22488fbd6fbc925d19bef792e07e9a377b3088d60787231f9547ba2
102 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 0.9945

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/roblox-zone-free-robux-game-hack PDF link annotation
    • http://110.232.82.59/__statics/gudangsoal/files/coin-master-game-hack-apk_GM406889139.pdfPDF link annotation
    • http://110.232.82.59/__statics/gudangsoal/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://110.232.82.59/__statics/gudangsoal/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://110.232.82.59/__statics/gudangsoal/files/coin-master-website_GM406889139.pdfIn PDF document text
    • http://110.232.82.59/__statics/gudangsoal/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://110.232.82.59/__statics/gudangsoal/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://110.232.82.59/__statics/gudangsoal/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://110.232.82.59/__statics/gudangsoal/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://110.232.82.59/__statics/gudangsoal/files/coin-master-support_GM406889139.pdfIn PDF document text
    • http://110.232.82.59/__statics/gudangsoal/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://110.232.82.59/__statics/gudangsoal/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.82.59/__statics/gudangsoal/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://110.232.82.59/__statics/gudangsoal/files/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://110.232.82.59/__statics/gudangsoal/files/grab-points-login_GM431946152.pdfIn PDF document text
    • http://110.232.82.59/__statics/gudangsoal/files/how-to-hack-and-get-free-robux_GM431946152.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_off00004673.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4673 27980 bytes
SHA-256: ccf8428353b358620af020fd04f2da8115791b726512e4629a932134317bc2ca
font_01_sfnt_off00008628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8628 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00008fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEA 18180 bytes
SHA-256: fa0bfd9229dff732b79349aec0b82eb394b94074e398d1bd7575aad3963e16a1

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