Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e5eb4bbf0e36ad…

MALICIOUS

PDF

33.0 KB Created: 2021-07-19 20:21:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ffa683bf9520e3e20806124194aa0c79 SHA-1: 728af357e2a9e7d758809de0c827d299a84a9f3a SHA-256: b1e5eb4bbf0e36adb027f395f148a097f6a31851c3e5c86fb72b8cb31bf85472
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' or 'game hacks' for popular games like Minecraft and Robux. The primary lure URL is http://netcdn.tw/app/479516143/minecraft-pocket-edition-free-download-game-hack, which is flagged as malicious. The document body and embedded artifacts suggest a social engineering tactic to trick users into visiting these malicious sites, likely leading to further malware downloads or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/minecraft-pocket-edition-free-download-game-hack In PDF document text
    • http://www.sapaengineering.kz/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-minecraft-servers-to-join_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_off00002cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFE 22224 bytes
SHA-256: f39cb57a97502cc50c70c04f5949894a0cbcb45c5a751b9688600751fa49075c
font_01_sfnt_off00005e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E33 18616 bytes
SHA-256: 74c3d0dac38db02fae044005a19145e6493ffdefda41676fc7dac63f0b05f007

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