Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b6ccaa9bb7a830…

MALICIOUS

PDF

35.6 KB Created: 2021-05-20 07:57:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 23d94a306e49c4582064f2f3f39ae865 SHA-1: 13453c65ceaa9ac0620c2e3dd44137022f04e8e7 SHA-256: a8b6ccaa9bb7a8300409b7f496435b841c7ebf5eb0423fdb2eb7d3fd97fe4440
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple heuristics indicating it is a lure for malicious redirects, specifically mentioning 'free generator / game hack' content. The embedded URL, https://netcdn.xyz/app/431946152/free-robux-discord-servers-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest an attempt to trick the user into visiting a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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-discord-servers-game-hack In 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_off00002d2d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D2D 26852 bytes
SHA-256: d40ce044d5f691558b5bb51a53041cd8252cbbce44add9d3915dd77a554936cb
font_01_sfnt_off0000694e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694E 18588 bytes
SHA-256: 987077e7e16e583019f60132f52646f266da53a12ca0a8940473eab7507416ca

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