Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d907ccdb8ae4cb…

MALICIOUS

PDF

29.7 KB Created: 2021-07-29 15:33:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0bab72383a878bc7a159b3bf846d3c7d SHA-1: f5ce6665252de6465c51f3260052ebac1f195461 SHA-256: 72d907ccdb8ae4cb0168170477decd52ee1c93cfe8235e5085570dd1199da9c8
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a malicious URL, masquerading as a 'Free Robux Generator'. This is a common social engineering tactic to trick users into visiting potentially harmful sites. The document body and heuristics confirm the presence of these malicious links and the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0556

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-generator-no-survey-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_off00001f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F5C 22304 bytes
SHA-256: c20fd528426ab756b322c11f709f030b1a7a93744dec81fc772a90635c337737
font_01_sfnt_off000050d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50D1 18828 bytes
SHA-256: aa75f5f05bb8eb79e565f5ac9cc0764234429369778194e6071f59ae7cf0b631

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