Malicious PDF — malware analysis report

Static analysis result for SHA-256 d647f0c71d558d04…

MALICIOUS

PDF

41.5 KB Created: 2021-04-27 13:50:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 42df6975c02957201c7af06e6998894f SHA-1: 1379fbb8be420501ac7346064e89957a48afb2af SHA-256: d647f0c71d558d0452f8138a74c6e1fc780c221e539de98f3cb12141a85c2682
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'Roblox Hack Glitch Free Unlimited Robux'. The document body and heuristics confirm the use of lures related to game hacks and urgency to entice users to click these links. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/roblox-hack-glitch-free-unlimited-robux-game-hack In PDF document text
    • https://lib.stie-yai.ac.id/repository/freetako-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/groups-in-roblox-that-give-free-robux.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-no-password-plus-link.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-cheat-in-roblox-ninja-legends.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-18-000-robux-for-free.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/pastebin-free-robux-hack-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-no-human-verification-or-survey-2021-on-ipad.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-jackets-on-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/script-executor-for-roblox-free.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-change-your-username-on-roblox-for-free-mobile.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_003_off000040fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40FD 25628 bytes
SHA-256: c2d9351a2a6b92d8a924736ab59e9102ce79e4ede5cb631d694c58c148410a2a
font_01_sfnt_off00007cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFC 19496 bytes
SHA-256: f6c0f4f0b24581eca1872885ea3990a19e0af2bfa52443ad5f4d588ef7ea0969