Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d81614f1331735…

MALICIOUS

PDF

36.1 KB Created: 2021-05-21 11:39:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 47ac9c532a3e8a66bfc31999140b58af SHA-1: 6f93482ca3c86845711f6bbdaa799e5735834897 SHA-256: f4d81614f133173547259006f345a747eda9d24fd9e6291bb91e1441c47238ce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as offers for free game items like Minecraft printables and Robux. The ML classifier also flagged this PDF as malicious. The embedded links likely lead to further malicious content or phishing pages, indicating a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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 https://netcdn.xyz/app/479516143/free-minecraft-printables-game-hack In PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-tiktok-followers-royal-key_GM835599320.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3517 24832 bytes
SHA-256: 2449b2b13f5670d258fb8b2a96863cba39dd2d07bbb0e796f51307dc32b876f3
font_01_sfnt_off00006d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D14 17956 bytes
SHA-256: e5df45a09fd76c24ea43a7fa28fc5fe559da15feee3d3577044ff876206ae01e

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