Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cfbfb68cede275d…

MALICIOUS

PDF

38.9 KB Created: 2021-05-16 02:03:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ad49d64285919426bc03e1d3696fd9e5 SHA-1: 780a546e388f6e4555bf82d279c397c3ebd0a2ca SHA-256: 7cfbfb68cede275d929a229e23b34b8f7b8144d6a80da5d00147c94fc4669957
170 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a game hack redirect lure, directing users to a malicious URL. It also presents a fake CAPTCHA to trick users into interacting with the malicious content. The embedded URL is likely intended to download and execute a second-stage payload, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/how-to-hack-roblox-accounts-game-hack In 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_003_off000035a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35A5 27708 bytes
SHA-256: ecbaa16775c98d4fce7d4d8d46392d4131ca2641eb19e33b4f805ac8cf64ca2f
font_01_sfnt_off000075a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A6 18588 bytes
SHA-256: 7bfa318362f39458d7d6cfaed4b7fb6212c616d22e88bbb7e9e73b07c323fe95

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