Malicious PDF — malware analysis report

Static analysis result for SHA-256 9286535e29a3c690…

MALICIOUS

PDF

34.4 KB Created: 2021-07-08 21:49:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d9dee01cd309358b7aca8e3ae5061067 SHA-1: 853197ca86c29510741f8b8ed8214255782e3584 SHA-256: 9286535e29a3c690651fb2e738c98c03cff1dad4426a177de8b5b62a549afd55
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to pages promising game hacks and free currency, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports a malicious intent to redirect users to potentially harmful sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-spin-and-coin-blogspot-com-game-hack PDF link annotation
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/hack-a-game_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-robux-fake_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/get-free-vip-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/paint-exist-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/reach-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-roebucks_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/how-to-get-free-followers-on-tiktok-without-human-verification_GM835599320.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/http-bit-ly-coin-master-hack_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
font_00_sfnt_off00003096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3096 22256 bytes
SHA-256: b9009201f7e155392b48021306528c00cd221eb9dfe33b3d18da2bde472deded
font_01_sfnt_off000061e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E2 18900 bytes
SHA-256: c9f482fa9571823af530795aa42c78100b5aa17059c8c3d8f536f2a3678c7b5e

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