Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6783b0d26b0f28…

MALICIOUS

PDF

36.6 KB Created: 2021-05-21 15:40:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 33cf4b36536720622132a1e99152e37e SHA-1: 6dff315384ab95610d546cc49cbe1432b8f55904 SHA-256: 5e6783b0d26b0f282037da92ffdd5ccb9119fcdc9d336db006a6581444d60f1a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector for a 'free generator / game hack' lure. The document body explicitly mentions 'How To Hack Roblox 2021' and includes a call to action to access a generator. This indicates a social engineering attempt to trick users into visiting malicious sites, likely to download further malware. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/how-to-hack-roblox-2021-game-hack In PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/tiktok-likes-free-trial_GM835599320.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/minecraft-creative-mode-free_GM479516143.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_off00003411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3411 24432 bytes
SHA-256: 099ccd613d25271f8c920f39e4c14385ad4f112008c605f67062bd686ba7879d
font_01_sfnt_off00006c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2E 18748 bytes
SHA-256: 82830e686af2a9787477f8716b243dfdc4e826425849e85a18f820c98dc205f5

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