Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a89752cb6d1add…

MALICIOUS

PDF

33.6 KB Created: 2021-07-20 01:41:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 11f183d8114f6fe3f6c9ba8c9e86b281 SHA-1: 5d53b36d953844e3cf7c145ef0a06a235d1a741d SHA-256: 51a89752cb6d1adda134af8667e4ae8b73efa662e3ab90e776855de1cfacc729
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a fake CAPTCHA lure to trick users into clicking malicious links, which are known to lead to redirector infrastructure. The document body and embedded links suggest a theme of free game hacks or generators, a common social engineering tactic. While no scripts were extracted, the PDF structure and embedded links strongly indicate an attempt to redirect the user to malicious content, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/can-you-download-minecraft-for-free-game-hack In PDF document text
    • http://eooe.gr/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • http://eooe.gr/images/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://eooe.gr/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • http://eooe.gr/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://eooe.gr/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-hack-without-verification_GM406889139.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_off00002f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F68 22228 bytes
SHA-256: 9d8ba08e88248e2698187615730c8f06320652621817f939d3ead186b50464a7
font_01_sfnt_off00006064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6064 18592 bytes
SHA-256: ed5684d9a13e4aff878e16593a586bb1b0a035d61c002246dac68e4b539701c0

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