Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cda41a2eb9dc212…

MALICIOUS

PDF

28.9 KB Created: 2021-07-20 01:20:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d34838c4fb8199ce3d568b5e50245835 SHA-1: 9ed302b2ef1e0f194e111753b57eb79a149ce94a SHA-256: 1cda41a2eb9dc21231c012e34678649d34df82fcaeb868fb6fe568d537636c29
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically a site offering 'free TikTok followers' and 'game hacks'. The document body also contains similar calls to action. This indicates a phishing or scam attempt designed to trick users into visiting a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier clean score 0.0553

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-tiktok-followers-free-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_off0000203a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x203A 22240 bytes
SHA-256: 53e437656b8345ec1edeb68db5940795942d2357695fd59601ac7dc64e91e6a9
font_01_sfnt_off00005155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5155 17692 bytes
SHA-256: 8cacd57cbae25f5163b35c5b464cf1f4e6be88960ce09657a88da3590579257c