Malicious PDF — malware analysis report

Static analysis result for SHA-256 21cd7e95f8225179…

MALICIOUS

PDF

36.2 KB Created: 2021-05-22 05:37:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 19285d77e00ecf9dbaaa7787dd282f2b SHA-1: a8f09d7c7caaf021e1bfc25d89ac0416d1c23965 SHA-256: 21cd7e95f8225179a8d4535413b3e9476da0805922b35b61ecd02dd530036a72
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, disguised as game hacks or generators. The document body explicitly mentions 'free skins in Minecraft' and includes a call to action to access a generator, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

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/how-to-get-free-skins-in-minecraft-game-hack In PDF document text
    • http://laboraltoledo.com/images/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://laboraltoledo.com/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/blogspot-coin-master-free-spins_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
stream_002_off00003557.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3557 24416 bytes
SHA-256: b2eb8b2454bd5a1a90ce2aba3d7bf85007b4be2208e509d43ea52aaac87df06f
font_01_sfnt_off00006ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCC 18044 bytes
SHA-256: 6cc59c28d5557832b1af72f7b0f143d8adff3a85e9aacd177c0586c4e7a11f45

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