Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce257531de215c2f…

MALICIOUS

PDF

34.1 KB Created: 2021-05-21 08:50:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 21e8c4101f40ec4d2e0c96531283f95b SHA-1: 95274934bda3f6843cc402fcc0cb50e48de75b58 SHA-256: ce257531de215c2f0dcefeed5bca7975f76ee82844bfa22e271748d4f53c3a81
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, masquerading as 'free generators' or 'game hacks' for popular games and apps. The document body explicitly contains a call to action, 'CLICK HERE TO ACCESS TIKTOK GENERATOR', and directs users to a URL that likely serves a second-stage payload. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-likes-app-game-hack In PDF document text
    • http://taskcyg.nl/images/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/free-robux-instantly_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_off00002f07.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F07 23944 bytes
SHA-256: 2c61050d74c63a33c0725453d6c953c1c0b854825f18dc8929b54bf9fe32c2e2
font_01_sfnt_off000065b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B5 17632 bytes
SHA-256: 7e13fbc4119f45c5ff512709f8e7b8078fcbed6cc64991a23ef627420002bfc1

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