Malicious PDF — malware analysis report

Static analysis result for SHA-256 21d2d86d55e3fa52…

MALICIOUS

PDF

33.4 KB Created: 2021-07-24 14:12:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aa045f9162ed5dc81442868ac6ba9bcb SHA-1: 68306e2ae22b0ef9692fbb7c9ebeec1c89888e74 SHA-256: 21d2d86d55e3fa52fcd9aa12ee90aae2892ffc4af8ddc7a2283b2d775dabc819
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 game hacks and generators. The primary lure URL is http://netcdn.tw/app/479516143/how-to-get-minecraft-bedrock-for-free-game-hack, which is flagged as a malicious redirector. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/how-to-get-minecraft-bedrock-for-free-game-hack In PDF document text
    • http://caraless.com/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://caraless.com/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://caraless.com/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://caraless.com/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/free-minecraft-bedrock-server-hosting_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_off00002d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D26 22984 bytes
SHA-256: 14095400780dfaca2a7e2580c88e73518a880c1a828db3c8754f6f3ea5077999
font_01_sfnt_off00006031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6031 18436 bytes
SHA-256: 052b3e4eb9e318375354f57606905a9f494055cf593924234d38117cd20d5d16

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