Malicious PDF — malware analysis report

Static analysis result for SHA-256 604cb461a397bd52…

MALICIOUS

PDF

36.0 KB Created: 2021-06-23 08:55:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9e5ce911983795571845bdd0b89ec512 SHA-1: 21d06014e7658e4f1c65e512f4c5a926845afe2d SHA-256: 604cb461a397bd524f5a850c68a2135637dfeab5c8e763bf1e00533b24af53f9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a game hack lure to entice users to click on malicious links. The document contains multiple embedded URLs, including one pointing to an IP address, which lead to other PDF files. These files likely serve as a further lure or a delivery mechanism for malicious content, potentially exploiting vulnerabilities or attempting credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/comment-hacker-roblox-robux-tuto-2021-game-hack PDF link annotation
    • http://110.78.114.242/ckfinder/userfiles/files/wwe-roblox-hack_GM431946152.pdfPDF link annotation
    • http://110.78.114.242/ckfinder/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/hacking-roblox-peps_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/como-hackear-a-alguien-de-roblox-y-tener-robux-2021_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/roblox-jailbreak-money-cheat-engine_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/roblox-sued_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/roblox-reach-hack_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-free-spins-coins_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_off0000356c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x356C 22140 bytes
SHA-256: d6b99ab613e51734e8770a63e905b60a33e88e5bf016e190ab4cb5291aab1df1
font_01_sfnt_off00006626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6626 19564 bytes
SHA-256: c6387caea59cffb63df58fe7ba4a2770b4017d07a5e1a9061e378f0e957326f9

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