Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4b9c1e92e888cc…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 06:52:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a91010cc1f1f4a0406067102c92e4d3b SHA-1: 48cac73bf62f9f98d3e768408a5fc5dddccf84df SHA-256: ae4b9c1e92e888cc45bb9f7efbd71f9edb1be90cda62839cdfd072dd5564a35f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one that redirects to a 'free Robux' generator, a common lure for malicious content. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the nature of the lure suggest an attempt to direct the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/free-robux-only-1-step-game-hack In PDF document text
    • https://www.tdbaska.hr/files/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-roblox_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://www.tdbaska.hr/files/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://www.tdbaska.hr/files/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/how-to-get-free-things-on-roblox_GM431946152.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_off00005166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5166 25000 bytes
SHA-256: fa64aa45fdd5f558f9aaac31378c56d3da1477e26735db447099a2c7dfd0403c
font_01_sfnt_off00008b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B61 18656 bytes
SHA-256: 070bf31dcf9002553526675ed1cd7b39f0747279791c235f0424fbc506b236c5

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