Malicious PDF — malware analysis report

Static analysis result for SHA-256 acbf4f52efec549f…

MALICIOUS

PDF

38.7 KB Created: 2021-05-22 06:35:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c1d278aab81d3f3c4f4739b1402597b3 SHA-1: 8697d6cb72edd50462a0652f66e1755f7206cecf SHA-256: acbf4f52efec549fb903edba9a819fde311bc2d323959b33b01d2a4951da3687
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and a call-to-action button designed to trick users into downloading potentially malicious files, masquerading as game hacks or generators. The embedded links, such as 'https://netcdn.xyz/app/479516143/minecraft-windows-10-edition-free-download-game-hack', are indicative of a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/minecraft-windows-10-edition-free-download-game-hack In PDF document text
    • http://grupodin.com.br/images/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/free-minecraft-accounts-reddit_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
stream_002_off00003642.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3642 30652 bytes
SHA-256: 0eab676a6550a1af577b01d6ef0387a0c049c83463b2f953f9610b44aeb22f0d
font_01_sfnt_off000074bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74BB 18764 bytes
SHA-256: cc8d2d4a5b4bbe222845f4f655e2132ea290cc3fc507b9f2ca034e5c83bdcdde

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