Malicious PDF — malware analysis report

Static analysis result for SHA-256 8daee6fa58e28831…

MALICIOUS

PDF

34.0 KB Created: 2021-07-19 04:20:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0174dc46aacd7cd6d9ad1a8d88908655 SHA-1: 3248dfebd99eecb5015ba98bc40277a4c0155c55 SHA-256: 8daee6fa58e288318523c1451fa729cbc724afc80c7831b66b7c6e7615005a6b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them, disguised as 'free generators' or 'game hacks'. The primary link, http://netcdn.tw/app/431946152/how-to-get-free-robux-without-doing-anything-game-hack, is identified as a malicious redirector. The document body and embedded links suggest a phishing or scam attempt to drive traffic to potentially malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-without-doing-anything-game-hack In PDF document text
    • http://www.armportal.co.uk/images/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://www.armportal.co.uk/images/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://armportal.co.uk/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.armportal.co.uk/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.armportal.co.uk/images/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • http://www.armportal.co.uk/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.armportal.co.uk/images/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://www.armportal.co.uk/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.armportal.co.uk/images/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://www.armportal.co.uk/images/free-robux-games-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
stream_002_off00002ab3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AB3 23196 bytes
SHA-256: 4a11270e34cfa538ea75cb39fa66d3a6fd0897a848573d73228292389cf7f757
font_01_sfnt_off00005f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24 19588 bytes
SHA-256: 2076f8eb29aaa86a7e78e1b1305efdafa9ca7953bc640d1b72175bdc2a844af6

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