Malicious PDF — malware analysis report

Static analysis result for SHA-256 441f43094b2f7f52…

MALICIOUS

PDF

28.9 KB Created: 2021-07-19 00:32:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8d4d821545d6290cd4ea71730d0cd2e8 SHA-1: 524ac45383a035b110ed4e557f046296a775db7e SHA-256: 441f43094b2f7f52067fca9af02a80b8b8ff80bc7a05b7770302ad589a9ad16e
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising 'free Robux codes' and 'game hacks'. The document body text and heuristic firings confirm this lure. The embedded URLs are likely intended to lead the user to download further malware or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier clean score 0.0794

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/free-robux-codes-2021-game-hack In PDF document text
    • http://acp-institut.fr/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBE 21812 bytes
SHA-256: a8c225d3af4b9bbc680f76eb5e44326c8bc46c36eaa89a774973e08c6a04c52a
font_01_sfnt_off00004da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA6 18776 bytes
SHA-256: 86719edcafa38007f3fc56311acd0ad5bd2c3683937e8590d35305e3fc241c35

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