Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd5b40ab7c5e548…

MALICIOUS

PDF

33.8 KB Created: 2021-05-23 20:10:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c7ccfc43f769fa63da418a6cdaca7c5a SHA-1: dfdf0d7ce25df0622220982c1bd0a3c21250cb04 SHA-256: ecd5b40ab7c5e54865f403d879c5f297d2e3fa758f0d3fee90553e89c647bf92
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to a 'free generator / game hack' lure, specifically mentioning TikTok fans. This is a common social engineering tactic to entice users to click malicious URLs. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent. The primary malicious URL identified is https://netcdn.xyz/app/835599320/tiktok-fans-free-game-hack, which is likely used to host or redirect to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9506

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/tiktok-fans-free-game-hack In PDF document text
    • http://axiapublishers.com/images/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://axiapublishers.com/images/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-how-to-get-free-pet-food_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_off00002f5f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F5F 23692 bytes
SHA-256: ac399ec66fb2901f262222b934029ee4089eeb5c747a59a3804916eec355e80b
font_01_sfnt_off0000648e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648E 17684 bytes
SHA-256: 22325babc2251f8239949cad6d45cc43a88f66264b3c8ea65c603fce63084c3f

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