Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ac178e26fd2cb2…

MALICIOUS

PDF

30.7 KB Created: 2021-07-18 23:12:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a8ac1d0d8578d9fce38139dda2aae8ee SHA-1: a73975e0a16a4171afabac4485b6c39a78235e9a SHA-256: b6ac178e26fd2cb2ddf42d84d8f29ab3812573ddf7c9c48dd94610b44d83c690
130 Risk Score

Malware Insights

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

The PDF file contains multiple links that redirect to known malicious infrastructure, specifically advertising a 'free generator / game hack'. The document body and embedded artifacts suggest a lure to trick users into visiting these malicious sites. While no scripts were explicitly extracted, the nature of the links and the heuristic firings strongly indicate an attempt to deliver a malicious payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0715

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 http://netcdn.tw/app/431946152/how-do-i-get-free-robux-game-hack In PDF document text
    • https://koeltotaal.com/images/how-do-i-get-free-spins-on-coin-master_GM406889139.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
font_00_sfnt_off0000227e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x227E 22672 bytes
SHA-256: 066956b0d8b3b975356c11f7585c691ca5c7c1bcc6ee28b394684cbf36b8d378
font_01_sfnt_off00005553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5553 18636 bytes
SHA-256: d712141aa631fad28075fa7e4ccba8f362a5a835cb3b6182b27b5dd18caf0422

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