Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f85d85e0398200…

MALICIOUS

PDF

38.3 KB Created: 2021-05-11 08:11:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dcd254403327489ec802087cd2bdf0ec SHA-1: b7c79b7df7f3d5fef10fac094fa4a8c36d05edc6 SHA-256: c6f85d85e0398200196f5a69ff97ca910a41dbbda411394b84f5de16d201d07b
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link disguised as a lure for free Robux or game hacks, which is a common social engineering tactic. It also presents a fake CAPTCHA to trick users into interacting with the malicious link. The embedded URL is known to be associated with malicious redirector infrastructure, suggesting the document's primary purpose is to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

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/get-free-robux-info-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_off000030e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30E7 25124 bytes
SHA-256: e5526545f58f3d0df8dd12d68f388cb8a3060edde78cebb13fe06188ce3110b8
font_01_sfnt_off00006ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD9 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off0000749a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x749A 18120 bytes
SHA-256: 6e6e8bb7c0e640fc67837f70826b1bbd381eb05acf75ec047415621944091573

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