Malicious PDF — malware analysis report

Static analysis result for SHA-256 20fb046187c4e857…

MALICIOUS

PDF

38.2 KB Created: 2021-05-21 23:38:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 606f7c194228b9314081cd98a5430a3e SHA-1: 8a69ce1d1382f82e2ed3a25444b0aadee70b1f1d SHA-256: 20fb046187c4e857b750f5174a2a7418f82e9ffcd5573e2b55659edf01c77022
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically promoting game hacks and free generators. The document body and heuristics indicate a lure to click these links, which likely leads to further malicious content or downloads. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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/coin-master-daily-free-spins-and-coins-game-hack In PDF document text
    • http://spstrading-th.com/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://spstrading-th.com/images/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://spstrading-th.com/images/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • http://spstrading-th.com/images/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://spstrading-th.com/images/how-to-earn-free-spin-in-coin-master_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
stream_002_off0000313f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x313F 29424 bytes
SHA-256: d62f2c4e98a2027846f4fae32de451742abf7ef720b8d2abe1da4bc423bd6dff
font_01_sfnt_off0000739d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x739D 18480 bytes
SHA-256: 323fea871d3154f9ddf991b22fd859b77165b4ee4e2d03de0fe4666202988bbb

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