Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ffa3a33ab996bca…

MALICIOUS

PDF

36.0 KB Created: 2021-05-19 23:52:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a3e6ae290f28c960d8ece592b24865e3 SHA-1: 5d3c09f511793bedc574dfd2ea79b173b992052b SHA-256: 3ffa3a33ab996bca3461b4b05483dc9f425057cf7ec09790636eda66b25737b5
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating a lure for a 'free generator / game hack' that redirects to known malicious infrastructure. The document body also contains text and a link pointing to this malicious URL, suggesting an attempt to trick users into visiting a compromised or malicious site. While no scripts were directly extracted, the nature of the PDF and the embedded malicious link strongly suggest it's designed to lead users to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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/tiktok-free-view-easy-verification-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00002dfd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DFD 27308 bytes
SHA-256: 6c22d0c3022c1597480d98460b0bb9ff86159e0efad24ad9e54dd1e50a473ba7
font_01_sfnt_off00006b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7C 18160 bytes
SHA-256: 5779170a2ae416b6ac02b73159bc04b1a3277b6095aff79bffcca7fd731900e5

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