Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a88f168b89098db…

MALICIOUS

PDF

38.9 KB Created: 2021-05-21 16:03:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e70f69ffb44290311c6f898e03540c84 SHA-1: 260b9a5610a8ee0d0a5e89444a5bccc0716c3798 SHA-256: 6a88f168b89098db4bd477ab7378f7e762ea5c7e478648f6d86feee45623ed2f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, disguised as offers for free Robux and game hacks. The document body and heuristics indicate a lure to trick users into visiting these malicious sites. While no scripts were explicitly extracted, the nature of the links and the lure suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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-or-survey-or-download-game-hack In PDF document text
    • http://centr-expert.su/images/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/ww-roblox-come_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000349d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x349D 27072 bytes
SHA-256: ce3e56e022c36e62e941fc89b15557bdc2d93a72497775fa38e0fc37cda2d5fd
font_01_sfnt_off00007269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7269 19736 bytes
SHA-256: 59e4374f8172b973ba9217c83b5ce6b26483f5ae1ceeffd331798f57e1658bad

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