Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a26b832714c82a…

MALICIOUS

PDF

36.2 KB Created: 2021-05-23 17:55:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e31cc7693ef21c15be36fd1d5f0dc9c9 SHA-1: e8d587e235651cd3b6e7dc19cdde7e9316457712 SHA-256: 51a26b832714c82a8f716ea89b0f26a1643f134367fee324ab61cba5ae22ba4a
160 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generators' or 'game hacks' for popular games like Minecraft. The heuristic PDF_GAME_HACK_REDIRECT_LURE and PDF_MALICIOUS_REDIRECTOR_LINK strongly indicate a phishing or scam attempt. While no scripts were explicitly extracted, the nature of the links suggests a potential for further malicious activity, such as downloading a second-stage payload or exploiting vulnerabilities.

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/minecraft-java-edition-code-free-game-hack In PDF document text
    • http://www.peterdejonge.nl/images/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/mcpe_GM479516143.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.peterdejonge.nl/images/roblox-free-robux-com_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
stream_002_off0000343a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x343A 24692 bytes
SHA-256: 28d90eb666a3468ce790e33513cdc9d55744e1663ac3a15d27680a2d8192b321
font_01_sfnt_off00006c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7F 18164 bytes
SHA-256: f60a0ad92d00317e2c15f806bb6b4e732b7ddb4bf4afc6afb4b51f1f749874bc

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