Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d198a61140436d8…

MALICIOUS

PDF

39.9 KB Created: 2021-05-14 18:01:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4022902f840fccafb6bdb7e26135796b SHA-1: 18772e2f2187fe4c1cbab3404049132c4752328b SHA-256: 9d198a61140436d894ed06d3737f4e7cf8a6d6a178aa22e2fd853a8170adfe03
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body also contains text related to hacking and free Robux, reinforcing the lure. The embedded URL is the primary indicator of malicious activity, likely leading to a further stage of compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/how-to-hack-and-get-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_off0000320f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x320F 26140 bytes
SHA-256: 52f395fb404f13b52a0ad1fe2a6ba72b4ac2d949232dfd044ee60a0534095db5
font_01_sfnt_off00006ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF7 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off000078a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A5 18856 bytes
SHA-256: d1af75e50eba08e00cb44d21026f4cdbf29920fa5250f1112d9d0eb56b6eb802

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