Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ecf332a0ce3cc5c…

MALICIOUS

PDF

39.0 KB Created: 2021-05-22 21:39:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b6cff9304dc3409c3ad1cd5007428f3f SHA-1: 6c0cf96f3b4ee5f4c95823aeda3fd167568653c4 SHA-256: 3ecf332a0ce3cc5ca184979599f373c1942fba145fcb460b18ca1eee108e2293
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, one of which is identified as a malicious redirector. The document body and heuristics suggest a lure for 'free Robux' or game hacks, indicating a phishing or scam attempt. The embedded URLs likely lead to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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 https://netcdn.xyz/app/431946152/free-robux-without-verification-2021-game-hack In PDF document text
    • http://axiapublishers.com/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/free-coins_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/free-robux-generator-no-human-verification-or-surveys_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
stream_002_off00003493.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3493 29036 bytes
SHA-256: 3437682676ef7eb2a4e8d4617d349e2e59be93c5f6d6fcaf8d9836e46a1b98a3
font_01_sfnt_off0000741d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x741D 19368 bytes
SHA-256: a82984a519d7edf94c6531cfcf7f8df3cbe602e214b877051ae5dee029c294bf

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