Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4777ea125b3d986…

MALICIOUS

PDF

28.5 KB Created: 2021-07-19 09:01:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e12bd7672e4c2440d3c9b6bfe55a27d7 SHA-1: 8537f889be8a313c233760797a018e1988f76c9b SHA-256: b4777ea125b3d9860c30c5c22dea99582b81a0ce28ddd120b18f1ea9f5e6e8b1
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and text lures related to 'Roblox Hacks' and 'Robux Generator', directing users to a known malicious redirector. The document body also contains a URL pointing to a PDF file hosted on a suspicious domain, likely serving as a secondary lure or payload. The presence of these lures and the redirection to malicious infrastructure strongly suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0463

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/roblox-hacks-2021-game-hack In PDF document text
    • https://elman1td.sam73cyber.com/__statics/gudangsoal/files/free-minecraft-alt-accounts_GM479516143.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_off00001df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF6 21156 bytes
SHA-256: 55ed339b6aef4e63aeda96edb349fb81cbdb8dff083a041939d3a79b80897fc0
font_01_sfnt_off00004c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C0E 18772 bytes
SHA-256: f404702c6ebb54461c96635651d1cc1e8daf221ec2b2a1d14d4d71b0dc657f1c

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