Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e54544ea77579d…

MALICIOUS

PDF

30.5 KB Created: 2021-07-19 08:11:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3deafaa43151f9af207df559fe410e5c SHA-1: 725dec0f793e4b464f0ce9ebaf668ab6f2ec16b3 SHA-256: 29e54544ea77579d99b7c9a559ecb1b5fd941ded8df268c6ab5004f34a90ce4f
160 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to a known malicious redirector, disguised as a 'free Robux generator' lure. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to a second-stage payload or phishing page designed to steal user credentials or compromise the system.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8665

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 http://netcdn.tw/app/431946152/rbl-gg-free-robux-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/robux-free-online_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-redeem-codes_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
font_00_sfnt_off000022f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22F5 22296 bytes
SHA-256: e82a8d6d5ca114377d90ddfd57c979c1b33bd244a9be5d1563999cc370d0a230
font_01_sfnt_off0000547d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x547D 18564 bytes
SHA-256: 58613d845c4ac8afc8e5c0598546d9b082a4cfb9e9fba4292ddf1deb4c958fa3

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