Malicious PDF — malware analysis report

Static analysis result for SHA-256 db873cdf00e9c062…

MALICIOUS

PDF

37.5 KB Created: 2021-05-23 17:33:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7b3cb02fb9375627ae74c9a6157f382b SHA-1: 2e4742b1a60fc1df8917fe83416d6d6730719866 SHA-256: db873cdf00e9c06266e8c7b2fd241fa1fcdf6f1c29a922f89cc88d56b9d534aa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to known malicious infrastructure, specifically advertising 'free generators' or 'game hacks'. The document body and heuristics indicate a lure designed to trick users into clicking these links, likely to download further malware. While no scripts were explicitly extracted, the nature of the links suggests a potential for JavaScript execution or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/835599320/free-tiktok-followers-no-survey-game-hack In PDF document text
    • https://www.gejovenlo.nl/images/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • https://www.gejovenlo.nl/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gejovenlo.nl/images/free-robux-android_GM431946152.pdfIn PDF document text
    • https://www.gejovenlo.nl/images/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.gejovenlo.nl/images/minecraft-mod-menu_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_off00003284.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3284 27620 bytes
SHA-256: e103a0edb4190a77ba6521022112b23b384c1ad1b1cc0d25ed3a7260b3d8d316
font_01_sfnt_off000071f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F2 18128 bytes
SHA-256: 4d5ae90dc7158db100f8a60f18795856627c30e44bb6186b706c2f28ceb56c30

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