Malicious PDF — malware analysis report

Static analysis result for SHA-256 1726d74258ee0390…

MALICIOUS

PDF

43.3 KB Created: 2021-06-09 08:03:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 97be32032b399495d5cfa8f735f022fd SHA-1: 538a7581ca4fb44fab2cc02ee32c47dc8744d090 SHA-256: 1726d74258ee039083d6f3b7ff2fcb539db9a64cd080692cfb293c755a781f0b
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacking, directing users to a URL that is flagged as a malicious redirector. This suggests a phishing or scam attempt designed to lead users to potentially harmful content or further malicious sites. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0285

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.tw/app/431946152/how-to-hack-roblox-high-school-money-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_004_off00003d80.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3D80 25344 bytes
SHA-256: 7d6ce982c9d0cc1443c7eed92900dd8842d1a18ccbc28d7931b004fc110343f0
font_01_sfnt_off000077dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DD 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00008485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8485 19296 bytes
SHA-256: b95acc4c34fc2654c9c1d07f4d98b656bccc9ea1fa45182738ab0f849a9ecc69

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