Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef97dccde6e17550…

MALICIOUS

PDF

37.9 KB Created: 2021-05-23 08:12:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b0850944e1c2a7ba69c37d9409dc97f4 SHA-1: 7b55490529705b627813ff058683fa55186db1f8 SHA-256: ef97dccde6e17550c451a01dc5e6e041f6ecba09cafcf855eeaf2bcddb3fc42b
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and lures users with promises of free items like TikTok followers or game hacks. The document body and heuristics indicate a redirection workflow designed to lead users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to exploit vulnerabilities or trick users into downloading further malicious content.

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/835599320/free-tiktok-followers-no-human-verification-game-hack In PDF document text
    • http://legs11.co.za/images/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://legs11.co.za/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/free-robux-link_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_off00003363.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3363 29088 bytes
SHA-256: f7f8b0bdf1640a0c8d71416d7ad118d3f100569d675b8145e43b08833278d2fd
font_01_sfnt_off0000726b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x726B 18456 bytes
SHA-256: 6fa1441c1a321216f6114c799401e851ec7285796cff0c56691a74954fdf2722

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