Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85c82e6bc8fc7b1…

MALICIOUS

PDF

37.4 KB Created: 2021-05-11 05:12:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aee4d55c7a9a42d38b024852af4f5697 SHA-1: 922918697c37b0b6a83eee5593d84c4c9f01f21c SHA-256: b85c82e6bc8fc7b12959bd2a8c93c8193acefae0a229baff725c147d173ffbed
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'free generator / game hack'. The document body and metadata indicate it was generated by wkhtmltopdf, suggesting it might be a crafted lure. While no scripts were explicitly extracted, the presence of malicious redirector links and the lure itself strongly suggest an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/479516143/minecraft-free-online-games-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_003_off000036c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36C8 26260 bytes
SHA-256: f113348527345afb0225784bad5fbc3c0aaea14d823cfd77074648bd411920f6
font_01_sfnt_off00007281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7281 17900 bytes
SHA-256: 4b77619cba729584a62e96e7fd69b59749ae88ba583596c01091ec51b146d7ca

Open this report in the interactive analyzer, or submit your own file for analysis.