Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ad832ce7823bd8…

MALICIOUS

PDF

30.5 KB Created: 2021-07-19 08:52:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1fcae783e2522f9a86453c8ccc82dd68 SHA-1: b7141a2d6614f9c59e1d7c0309cef59a9000b9ba SHA-256: 51ad832ce7823bd8375ac499f997ddd0bed32c4cc1d9332cc405dc064128e76c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, including one that promises free TikTok likes and a game hack. The ML classifier also flagged this PDF as malicious. The embedded links likely lead to further malicious content or malware downloads, indicating a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9157

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 http://netcdn.tw/app/835599320/get-free-tiktok-likes-game-hack In PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/coin-master-hack-2021_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
font_00_sfnt_off00002684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2684 22332 bytes
SHA-256: dac5a859377415238de694861cf11daaea6d8fbd11bc0e172547dc803b80a344
font_01_sfnt_off00005840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5840 17456 bytes
SHA-256: c397690cc80b7cdd5818f6212e28c5067632df1cbe38d70f20361ec61b14abd9

Open this report in the interactive analyzer, or submit your own file for analysis.