Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e27fdb77b48690…

MALICIOUS

PDF

41.3 KB Created: 2021-05-15 12:00:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5c3dbe109102fde47850f9af81a11690 SHA-1: 7cf6f2c702a03ca0aff8caf650a89b61321615ec SHA-256: 64e27fdb77b48690377587a5f728ad51eec11022080b59745b331bd93baea264
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically targeting users with a lure for 'free Robux' or game hacks. The embedded URL, https://netcdn.xyz/app/431946152/free-free-robux-game-hack, is identified as malicious infrastructure. The document body also contains text related to this lure, reinforcing the social engineering aspect.

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-free-robux-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_003_off000032df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32DF 27508 bytes
SHA-256: 393557eebba31888f6374c11e32cee71bc22d3e56cff7f7f0a6c6b64cdf29791
font_01_sfnt_off000073e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E1 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000080f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F3 18012 bytes
SHA-256: 3ef9e48aa3d97d4217e004f7625a8cbae9320a74231b80a01553f6433e422360

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