Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e713f8e18c1e1f…

MALICIOUS

PDF

33.6 KB Created: 2021-07-19 08:01:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4acd5ca973981fa2c218e9fceceaf3de SHA-1: 07f09b9831b965ee91ea4cdcd93cc86f8f97db0e SHA-256: 85e713f8e18c1e1fd1ef4cb36d0017ef2ec61e4eecc426d40eced0ec7b1da7ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a lure for 'free TikTok fans' or 'game hacks'. The document body and heuristics confirm the presence of these malicious redirector links. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into visiting potentially harmful sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8871

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/free-tiktok-fans-no-human-verification-or-downloading-apps-game-hack In PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/minecraft-mac-free_GM479516143.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_off00002963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2963 23660 bytes
SHA-256: 34e2788db4ebb356143a191e07e3773e987c575a7e18e73ec3b461cd2d217037
font_01_sfnt_off00005f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F25 19260 bytes
SHA-256: c23abd5df90a5b7093cc3e198b5bcaea5ee7ff11a274e14c679da15d1a345c21

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