Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f3c21cbb62f758…

MALICIOUS

PDF

35.3 KB Created: 2021-05-22 19:46:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 392b5a86d9434436e826d9b653d3e7a6 SHA-1: 882b5abc1177beb4913d842d09874b326c225290 SHA-256: 25f3c21cbb62f758d27b5d83092071f6170507b7dace10d0f08a154ee44620fb
160 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that redirect to known malicious infrastructure, specifically advertising game hacks and free generators. The document body and heuristics indicate a lure to download or access these "hacks", which is a common social engineering tactic. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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-minecraft-for-free-on-mobile-game-hack In PDF document text
    • http://posterprintshop.nl/images/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://posterprintshop.nl/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://posterprintshop.nl/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://posterprintshop.nl/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://posterprintshop.nl/images/free-robux-no-human-verification-or-survey-2021_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_off0000312d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312D 24704 bytes
SHA-256: a1eb38060d7608d5099eadf8ee965ef3c3539a847de70e9e4308ee3837e0031e
font_01_sfnt_off00006919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6919 18104 bytes
SHA-256: 355b14cb1237cfcb324f2687d1fc3cafef0ca686705333751d3cf0333155011f

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