Malicious PDF — malware analysis report

Static analysis result for SHA-256 683876461c0ecbba…

MALICIOUS

PDF

42.7 KB Created: 2021-05-13 08:08:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0c2104dbb02f56c6fd2a7af7a39379b0 SHA-1: 957d4b5f9fbcb6fe276178dd7c62013a7f4d974a SHA-256: 683876461c0ecbbae65f1f66b73acc68eda7b5703d475ce03f30f9b41a266555
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple heuristics indicating it is a lure for game hacks and free Robux, redirecting users to malicious infrastructure. The embedded URL 'https://netcdn.xyz/app/431946152/free-robux-no-human-verification-game-hack' is flagged as malicious. The document body also contains text related to free Robux and a call to action, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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-human-verification-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00002ef3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EF3 31756 bytes
SHA-256: ab41e7c8f1e1127e123d23b0376b17e9b2cf20c82a321a2ad99519a729ffc183
font_01_sfnt_off0000770b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770B 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000841c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x841C 18860 bytes
SHA-256: 7bf6b254896799c3550cbaf8339a45bd8c79022df116fd793fc899e49cde55bc

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