Malicious PDF — malware analysis report

Static analysis result for SHA-256 d759116d1bf9c6ec…

MALICIOUS

PDF

30.0 KB Created: 2021-07-22 09:00:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 27a698d758ef0da4dd98b6aaf355c203 SHA-1: a52ba308744bb6e418a507e1e2e00633ff9e7a71 SHA-256: d759116d1bf9c6ecf48f0cf8a16c89753bf8151a2e66e272c4dbcdeec1272d3f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'Free Robux' and a 'game hack', directing users to a known malicious redirector URL. This indicates a social engineering tactic to entice users to click on the link, likely to download malware or engage in phishing. No scripts were extracted, but the PDF structure itself contains the malicious link.

Machine Learning

  • Nyx PDF Classifier clean score 0.0560

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/free-robux-no-offers-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
font_00_sfnt_off00002227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2227 22476 bytes
SHA-256: 832edcfc668f68be82458c960e7645b0cb69b6edd6f1efafef973aed145d5dd9
font_01_sfnt_off00005415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5415 18200 bytes
SHA-256: 9667d64c08376f15d8cfb45c3aacba43ac1d421472699037c9c528d853194b66

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