Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59b466bbc087971…

MALICIOUS

PDF

39.6 KB Created: 2021-04-27 08:05:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0ce265682429a0fff02b16bdc4da03f5 SHA-1: ba658588262d84b958693627447ec242bd67fa67 SHA-256: a59b466bbc08797159d2a4ce9896261ccd799c2583ee53b53c399519bc0b91af
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as a "free Robux generator" or game hack. The primary lure URL is https://netcdn.xyz/app/431946152/free-robux-generator-2021-game-hack, which likely serves as a gateway to further malicious content. The document's structure and embedded links strongly suggest a phishing or social engineering attempt to trick users into visiting compromised sites.

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/free-robux-generator-2021-game-hack In PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/black-shirt-roblox-free.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-robux-glitch-game.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/cool-roblox-weapons-cheat-engine.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-robux-cheat-2021.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/pro-skin-free-roblox.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-robux-games-on-roblox-2021.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/get-free-roblox-2021.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/how-to-get-any-gamepass-for-free-roblox.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/script-for-have-gamepass-free-roblox-pastebin.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-robux-real-no-hack.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_off00003ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3EC6 25016 bytes
SHA-256: da9df917b06b9cf47d4297b036eafa5eb6230f6ad58171134b92f6dbd0abd9a4
font_01_sfnt_off00007781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7781 18748 bytes
SHA-256: fca1806ffff7593a0a2d811b077fe14576afb362c0c2e8ffc695fbf8edc3964d