Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b25dba8c402389…

MALICIOUS

PDF

46.0 KB Created: 2021-06-07 23:46:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 07b75366143f82680eb95c2b120f0260 SHA-1: d927586999d3f78bb1ea11c2b22a474b642196e2 SHA-256: d6b25dba8c402389284a73e6da5e107c5b457e9808b45a1eed5fb83510f8924c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting "free game hacks" and "robux generators". The primary lure is the promise of in-game currency or cheats, designed to trick users into clicking the malicious URL. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/get-free-robux-hack-2021-game-hack In PDF document text
    • https://www.bmta.co.uk/images/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/roblox-free-items_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • https://www.bmta.co.uk/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-hair-roblox_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • https://www.bmta.co.uk/images/coin-master-gift-link_GM406889139.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_004_off0000526a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x526A 26928 bytes
SHA-256: 1fbfc5b984a0c2bb5ad3648689401cbd9b603d43a84106466a3378a1c4d236cf
font_01_sfnt_off00008f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3A 18916 bytes
SHA-256: 61a301b79c44361b40af65bad68c58bfb2e2c7a196246d1deae398e7179baab1