Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d14a146ed4dc1d…

MALICIOUS

PDF

38.4 KB Created: 2021-05-11 18:00:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f90b7d0963b3f50c96ff88151ef4bb24 SHA-1: 14cf4999981c7e7fff43b3e7b0fbc850ccf7e3f8 SHA-256: c5d14a146ed4dc1dbe5cc1590e97239a86a866514a19a307ba9998fe1ebce53c
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector URL that is associated with malicious activity. The document body text and heuristic firings indicate a lure for 'free Robux' or 'game hacks', suggesting a social engineering tactic to trick users into visiting the malicious URL. No scripts were extracted, but the presence of malicious links points to a likely download or redirection to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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-games-that-actually-work-2021-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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
font_00_sfnt_off0000339e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x339E 26752 bytes
SHA-256: a70c947c80e86d8ffda46451e8664073e7156f818b94e4d28e982de4851f66a2
font_01_sfnt_off00007037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7037 19796 bytes
SHA-256: 825df7cf396e8d9c124972fb8483e304b72a256d7e3507e7d5ad5df48b88867f

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