Malicious PDF — malware analysis report

Static analysis result for SHA-256 25fda781b8fe6d7e…

MALICIOUS

PDF

36.0 KB Created: 2021-05-22 10:09:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: af3075fe65a31931cd583f0722ff413c SHA-1: 6e65281bbcd1b64e6e3c078b3544337c18bb5755 SHA-256: 25fda781b8fe6d7e4695c6cd9af5076534262fc17498455f5bcb4610a47bcb76
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, masquerading as "free generator" or "game hack" lures. The embedded document body text and heuristic firings confirm the intent to trick users into clicking these links. The ML classifier also flagged this PDF as malicious. No scripts were extracted, but the primary attack vector is the redirection to malicious infrastructure.

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-alt-accounts-game-hack In PDF document text
    • https://studiodegaetano.it/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://studiodegaetano.it/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://studiodegaetano.it/images/free-robux-come_GM431946152.pdfIn PDF document text
    • https://studiodegaetano.it/images/pokemon-go-free-30-ultra-balls_GM1094591345.pdfIn PDF document text
    • https://studiodegaetano.it/images/free-daily-spins-coin-master-2021_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
font_00_sfnt_off00003316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3316 25304 bytes
SHA-256: 1b3f0d71931eec01f0d9b4b0a563566106986627a302da72a476214c25e6fa98
font_01_sfnt_off00006cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAD 17924 bytes
SHA-256: ca2704b96dad28857c40796bc5f3f160f1252a4638d6e656e043cddf4ab01458

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