Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4fa7e74244b2d76…

MALICIOUS

PDF

30.1 KB Created: 2021-07-21 23:50:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 43487996561125404db84bab4caf614b SHA-1: 10cf7b818d9550470092bf951db00b9ef2c8a5e8 SHA-256: b4fa7e74244b2d76a486b48e43af33adf6970257e814bc72b1ae1c031016f3bb
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a website offering 'free TikTok fans' and 'game hacks', a common lure for malicious content. The heuristic firings confirm these links point to known malicious redirector infrastructure. While no scripts were extracted, the document body and heuristics indicate a phishing attempt to drive users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0573

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
    • 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_off00001fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE1 22212 bytes
SHA-256: b6726d34a8abee8e734629bc59986a7527c8d0049b78d57e186c174667b48008
font_01_sfnt_off00005159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5159 19260 bytes
SHA-256: c23abd5df90a5b7093cc3e198b5bcaea5ee7ff11a274e14c679da15d1a345c21

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