Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c18a120ca989ae…

MALICIOUS

PDF

39.8 KB Created: 2021-05-17 17:30:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 70f10ef1573a953a92eb0702dbfd77f7 SHA-1: e945eca7dc2e7a18d8d5cb850b17be8edd0042ed SHA-256: d9c18a120ca989ae4963bef59bfceec07a043310cc78bce56187b8a00b949ad0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating it is a lure for malicious redirectors, specifically advertising 'Free Robux Codes' and 'game hack' generators. The embedded URL leads to known malicious infrastructure. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used in such redirection schemes.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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-codes-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_003_off00003429.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3429 25648 bytes
SHA-256: 0057eab29ac410b9b7e8c711b2081d36d28d8c3228db0007f974b319fa4a8998
font_01_sfnt_off0000700b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x700B 2992 bytes
SHA-256: c9589250b6e3dd7e493fc9a03624bebef57e2a5a7267189a2827bf8e702c894e
font_02_sfnt_off00007a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A60 18188 bytes
SHA-256: 7763b0eba74f003993d6ddc379ef756dfeeff7cedd1b34d70c41f8674d393ab3

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