Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c59271dcd1f9010…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 05:56:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: dd744f39be0c192ef837987681192763 SHA-1: 0fd7f982c9f60d5f5d8b92fbc552d9c83d9470ee SHA-256: 4c59271dcd1f901064c8d52e650285105ab027807112626830acbe5c98dbd3f8
188 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links to known malicious redirector infrastructure, specifically disguised as a 'free generator / game hack'. The document body, though heavily obfuscated, contains references to the malicious URL. This suggests the file is designed to trick users into visiting a malicious site, likely to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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
  • 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.online/app/479516143/free-minecraft-server-maker-game-hack In PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/wurst-115_GM479516143.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/hack-robux_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/edm-reaper-free-robux_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/tiktok-app-install-free-jio-phone_GM835599320.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/how-to-get-100-free-spins-on-coin-master_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_004_off00005400.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5400 25264 bytes
SHA-256: d119d3cec0b88b29a50c41bf27a0f98bf9ba5b9ee3035e287166da9f4d4a0021
font_01_sfnt_off00008d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D62 17852 bytes
SHA-256: a2113846211f941d41962086a33418b46c13efddcea93467eebdb757cad7d920

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