Malicious PDF — malware analysis report

Static analysis result for SHA-256 722d9a63b6d82d5c…

MALICIOUS

PDF

35.9 KB Created: 2021-05-23 23:10:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d6c369516896c5dd18803057cc230af3 SHA-1: 1d5c7dd3a9b5267d7ede0e981485f2d404eaef81 SHA-256: 722d9a63b6d82d5c53572ad2db8f0c057f0b6015b318bd100fa56772721cd0fc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games. The ML classifier strongly flagged this PDF as malicious, and heuristic rules indicate it's designed as a redirector lure. While no scripts were directly extracted, the embedded links suggest an attempt to download a second-stage payload.

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/406889139/free-spins-coin-master-2021-game-hack In PDF document text
    • https://www.academiaanticorrupcion.org/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://www.academiaanticorrupcion.org/images/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • https://www.academiaanticorrupcion.org/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.academiaanticorrupcion.org/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.academiaanticorrupcion.org/images/cpbildco-robux_GM431946152.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_off00003118.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3118 25312 bytes
SHA-256: 015c71139f1e5c2d8cc0307f5679a85f994ca44c876567c69a987963316ce2ca
font_01_sfnt_off00006ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD5 18288 bytes
SHA-256: 9732707b45c862b7a6ef8ea2418900def9be3650c6b325207d932644f64622ad

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