Malicious PDF — malware analysis report

Static analysis result for SHA-256 370090ea62357b81…

MALICIOUS

PDF

40.2 KB Created: 2021-04-27 14:50:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4e87a312afd57ab79a834c1895210007 SHA-1: ad3ead4324adf6987b4a3067bcbe26b292f1baae SHA-256: 370090ea62357b819a47e83cafffdd75f5f6eecb10a317a5fc0d3d71e190e55e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to game hacks and free Robux, directing users to a known malicious redirector. The document body and heuristics indicate a social engineering attempt to trick users into visiting a malicious URL. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lead the user to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.xyz/app/431946152/whats-a-code-for-roblox-to-get-free-robux-game-hack In PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-to-get-free-robux-in-lumber-tycoon-2.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/roblox-hacks-gratis.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/good-roblox-hack-exacuter.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/roblox-i-hacked-place-rebuilder.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/roblox-bloxburg-free-pastebin.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/assassin-cheats-roblox.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/roblox-games-that-give-free-radio.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/robux-and-tix-hack-v-7-download.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/delta-roblox-hacks.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-skin-on-strucid-in-roblox-how-to-get-i.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_off000041d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41D1 24528 bytes
SHA-256: abaaf192429367cfc45268bdf60013a672759caaa3209a8b7ac6e3d5b6e96b01
font_01_sfnt_off00007955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7955 18956 bytes
SHA-256: b60c874b9cecc7364d7321f3e296119ffaa8148ccaa34f8c151d8aaf9f1e64f1

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