Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e58782d3d82222…

MALICIOUS

PDF

36.7 KB Created: 2021-05-30 01:01:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0f8ada86441ecd862cb8e0a3971bcad8 SHA-1: d08797dcabef5b8df90fad54d77ab0eb111bf915 SHA-256: f5e58782d3d8222228d31e461b79822f5bfc0d67f2f070a775558cb65d5a635c
130 Risk Score

Malware Insights

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

The PDF contains multiple links to a known malicious redirector, disguised as a "free generator / game hack" for TikTok. The document body and heuristics indicate a lure to trick users into clicking these links. The embedded URL likely leads to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier clean score 0.0076

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-fans-and-likes-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002c96.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C96 24424 bytes
SHA-256: 901eb3e1e7d9983cfb1709a13d4c44fca35a4e50e22897719361749892b83c78
font_01_sfnt_off000064d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D5 3028 bytes
SHA-256: ab17a360e1c6cc3bd51eb0273e66e6e25a3de0a2710527473b1670adef5ba43f
font_02_sfnt_off00006f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3B 17856 bytes
SHA-256: 73670565195d1614abdebf4593265cc7a8d42409e9f7addc13b51e248eeb6564

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