Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8aac7f754c1acd…

MALICIOUS

PDF

40.6 KB Created: 2021-04-30 06:26:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 9b92f2e0e2933104f27fbc99faab02c2 SHA-1: 1c5d0b5d6dce71da6a474546c962ec9b0e43257a SHA-256: df8aac7f754c1acd9c2152943a87b3151c68191a2d1a6c3db3a264729b41fe66
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a social engineering lure related to game hacks and generators, directing users to malicious redirector infrastructure. The document also contains instructions to disable security software, a high-risk indicator for malicious files. The primary link, https://netcdn.xyz/app/431946152/v3rmillion-roblox-exploits-noclip-free-game-hack, is associated with known malicious redirectors, suggesting the intent is to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.xyz/app/431946152/v3rmillion-roblox-exploits-noclip-free-game-hack In PDF document text
    • http://www.cofradiadelosdolores.com/ckfinder/userfiles/files/roblox-arcane-adventure-cheats.pdfIn PDF document text
    • http://www.cofradiadelosdolores.com/ckfinder/userfiles/files/roblox-hack-de-romper-las-paredes.pdfIn PDF document text
    • http://www.cofradiadelosdolores.com/ckfinder/userfiles/files/roblox-scripting-free-help.pdfIn PDF document text
    • http://www.cofradiadelosdolores.com/ckfinder/userfiles/files/free-robuxs-ahack.pdfIn PDF document text
    • http://www.cofradiadelosdolores.com/ckfinder/userfiles/files/free-codes-for-free-robux.pdfIn PDF document text
    • http://www.cofradiadelosdolores.com/ckfinder/userfiles/files/cerberus-free-roblox.pdfIn PDF document text
    • http://www.cofradiadelosdolores.com/ckfinder/userfiles/files/belly-button-roblox-free.pdfIn PDF document text
    • http://www.cofradiadelosdolores.com/ckfinder/userfiles/files/growboxnet-free-robux.pdfIn PDF document text
    • http://www.cofradiadelosdolores.com/ckfinder/userfiles/files/players-involved-in-the-2021-hack-roblox.pdfIn PDF document text
    • http://www.cofradiadelosdolores.com/ckfinder/userfiles/files/free-robux-2021-no-survey-or-download.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_off000041a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41A9 25808 bytes
SHA-256: d2b4a85696d06ab5a05c21ac4590ab012547e2900186d7697f19d55cbdac5538
font_01_sfnt_off00007b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B29 18916 bytes
SHA-256: db0f83669b2c7c5b389b14362ea2a330bc813c9471d6a2e8417b4904d4802c89

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