Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e4fa87472869f3…

MALICIOUS

PDF

35.3 KB Created: 2021-06-21 13:53:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2538c0214e70fbc3d4029070d0806475 SHA-1: 25ff5b428415920cdc75459c2bc4f831c558ca30 SHA-256: 18e4fa87472869f3553f9c430eae78c20f04dc9a3f26dc7cfbbcf48a565f1b0b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.co/app/431946152/roblox-hack-download-jailbreak-game-hack. The document body and embedded links suggest a lure for game hacks and generators, a common tactic for distributing malware or conducting phishing. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.co/app/431946152/roblox-hack-download-jailbreak-game-hack In PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-robux-tool_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-levels_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/tiktok-free-coins_GM835599320.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/minecraft-114-download_GM479516143.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/roblox-data-breach_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/como-hackear-coin-master-2021-espaol_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_off000030f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F5 22792 bytes
SHA-256: df7eeb1c64449658eb00a86acb26e5782d8ebdb34e27d7c9fcf14a414d31b8a6
font_01_sfnt_off000063ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EE 19448 bytes
SHA-256: 11f052d48f0e8631e974aa39a464871a02471df42237d220f759d9b2ab0ce5c6

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