Malicious PDF — malware analysis report

Static analysis result for SHA-256 8236b320c59b8eee…

MALICIOUS

PDF

38.8 KB Created: 2021-05-24 01:18:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a8cd7715401a285910c438159aca5c35 SHA-1: 8f2e4e2216ffb092579f78db34f9760d0cb179bb SHA-256: 8236b320c59b8eee4eae1cd6f3a43cd0a41bbfa8b9b66fd6ecf3f211daa28abc
130 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically advertising a 'free Robux generator' which is a common lure for phishing or malware distribution. The heuristic firings confirm the presence of malicious redirector links and a lure for a game hack. While no scripts were directly extracted, the nature of the lure suggests an attempt to trick the user into downloading a payload or visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0134

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/make-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_002_off00002ef0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EF0 25872 bytes
SHA-256: 6ea6209e39dc31d3fd7d09d41e466e551c27df9d99e44add272544f01e97c89f
font_01_sfnt_off00006a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A98 3120 bytes
SHA-256: 49734f51977507cba6bc8d3ad0cee0363aa119856db094427deb9cf565bb7bca
font_02_sfnt_off000075ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75AC 18608 bytes
SHA-256: ffc801fe6c311414aab45f29f725ac19f85306497fb99419c1a1229f9950fbca

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