Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe704d811097799c…

MALICIOUS

PDF

29.6 KB Created: 2021-07-25 18:00:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c85a936b8747739a29307a4db302cb01 SHA-1: 77f98fd3c1a1db5f55642d896bfa3b26da4ff597 SHA-256: fe704d811097799cf2b88c3a952558ac513ae1d1853615cd15a5028f7b648685
170 Risk Score

Malware Insights

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

The PDF document contains multiple heuristics indicating malicious redirection and a fake CAPTCHA lure, aiming to trick users into visiting malicious websites. The embedded URLs, specifically 'http://netcdn.tw/app/431946152/how-to-hack-to-get-robux-game-hack', are associated with redirector infrastructure. The document body text also contains similar lures and URLs, reinforcing the social engineering aspect.

Machine Learning

  • Nyx PDF Classifier clean score 0.0573

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 http://netcdn.tw/app/431946152/how-to-hack-to-get-robux-game-hack In PDF document text
    • https://robuxhaxs.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F7F 22128 bytes
SHA-256: 43d2a3b78de61bb4f9ea5fc9a444fff771a528d5947a7c0bbcee15b929c2fccd
font_01_sfnt_off00005088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5088 18700 bytes
SHA-256: 422c4f1b8ce49a2bad5064ab2df80448ff4f857d80ac720e8fae67c1278daef4

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