Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8b4399d72b0886…

MALICIOUS

PDF

32.1 KB Created: 2021-07-19 10:21:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fdf528ff8bfa55509015db534aa9cf22 SHA-1: 6e531b65b74984e59f99bca2fd68709a23672db6 SHA-256: 0e8b4399d72b08866e8bdf0df509f2c7a6c0df76b99315a8dbcf1d4f94af93a3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically pointing to a 'free generator / game hack' lure. The embedded URL `http://netcdn.tw/app/479516143/free-minecraft-bedrock-server-hosting-game-hack` is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and link targets suggest an attempt to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9466

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/479516143/free-minecraft-bedrock-server-hosting-game-hack In PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/earn-free-robux-for-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
font_00_sfnt_off000028d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28D3 22504 bytes
SHA-256: 0fd1ab2caa2cf15ce9fc211943bcb5d7ff333a66968748025f5a143375151273
font_01_sfnt_off00005aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA7 18672 bytes
SHA-256: fcf161d812b4feaa3e2bf8e8c417d8656b3909a46e27a4c0a1d90eda073f6fc6

Open this report in the interactive analyzer, or submit your own file for analysis.