Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cb9af3cb2398584…

MALICIOUS

PDF

38.1 KB Created: 2021-05-17 09:00:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aa1a452215075382150004128ffe107e SHA-1: d5d421083026aec61bc01fffbac043fcd83dfdb1 SHA-256: 8cb9af3cb239858469406ca8be2708d1bd6ac7d816266d5eacf97ba34a8633fa
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body and embedded artifacts suggest a lure for a 'Roblox Hack' or 'Robux Generator'. The embedded URL is the primary indicator of compromise, likely leading to a further stage of infection or a phishing site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

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/roblox-hack-me-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_off00003008.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3008 24636 bytes
SHA-256: 23a7c461848ceef568b568bede34971e5ebd9911543276d26124e0c2e139d043
font_01_sfnt_off000068ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AC 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7297 18520 bytes
SHA-256: a375bd11c65aaa265b5abc99eda8135c05062389b04afd63241033984f92b3c1

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