Malicious PDF — malware analysis report

Static analysis result for SHA-256 8928ca1fc804ca75…

MALICIOUS

PDF

36.4 KB Created: 2021-05-22 13:06:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 64591ac7f6c0e9c875d888b51cde6eaf SHA-1: 9d62db4e02ac90ef88aa46d3c01a4705ecd5f145 SHA-256: 8928ca1fc804ca752293543d42b0cc90337332bd28e8ef69ebdd433be30a0c97
160 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs that point to a known malicious redirector infrastructure, specifically designed to lure users with promises of free game hacks or currency. The document body and heuristic firings confirm this lure, indicating an attempt to lead the user to potentially harmful content or further exploitation. While no scripts were explicitly extracted, the nature of PDF redirects often involves JavaScript execution to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/get-free-robux-now-game-hack In PDF document text
    • http://bogatyr.com/images/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://bogatyr.com/images/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://bogatyr.com/images/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://bogatyr.com/images/free-account-roblox-with-robux_GM431946152.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
stream_002_off0000334d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x334D 24904 bytes
SHA-256: 63ebac9ba1cd682a37db0310b298e257c6e6dbd6eac6c4fbd47617b114ff84e5
font_01_sfnt_off00006cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEF 18280 bytes
SHA-256: 538c9dd0db01d2f7ccbac1c4b1e59781ee6b2d24c7879b3cb67aab50807a8027

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