Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c95e152bc55ea60…

MALICIOUS

PDF

36.0 KB Created: 2021-05-20 13:35:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 86670a2d00582283713fe6a0503cf8a3 SHA-1: 07c0fd57272e4d1f8267ff03d344a119e4c37197 SHA-256: 9c95e152bc55ea60991c3445dad578ead4cdf34ef8b410e7f0d64f840a131dab
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector URL. The document body also contains the malicious URL and a call-to-action phrase, reinforcing the phishing attempt. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a further stage of compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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/431946152/free-robux-no-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_off000030ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BA 26360 bytes
SHA-256: 98bcd2e9876f3c9e7bfb6bafa44cb877b2aa9c1d4ec81915b5398dc1918df234
font_01_sfnt_off00006c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0E 18192 bytes
SHA-256: dd781f2eaffddff6619a7729b763fabd5b8c4a088eef07f4c149f41bf202d502

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