Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f259c5eeef9c516…

MALICIOUS

PDF

45.7 KB Created: 2021-05-17 04:01:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1ec89602a7094b8e13a7df8fc2cd9eab SHA-1: d7315f1532d85e5e53321be15c8a752e460ca77e SHA-256: 4f259c5eeef9c516cd0def26dd1b8f8e6b42bdc652bb0590658c158e444d87aa
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating malicious intent, including a lure for game hacks and a link to a known malicious redirector. The document body explicitly mentions 'Free Robux Games On Roblox' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the social engineering aspect. The embedded URL leads to a malicious redirector, likely serving as a gateway to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier clean score 0.0146

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-games-on-roblox-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_off000039a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x39A6 26564 bytes
SHA-256: 4664cca754d1379837f4b6b75447c6ddac9544a155cc09c2eea9e2507af63c1c
font_01_sfnt_off00007850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7850 7420 bytes
SHA-256: 0b188308ab0e7ffce9913d63d697a586f2937cafc51a771db38e3a566cd37e24
font_02_sfnt_off000090c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C0 18576 bytes
SHA-256: 121d272924a8948b6bfdf19867642727f57edf659587de43eb46571e5003926c

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