Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ec677c902b1265…

MALICIOUS

PDF

31.5 KB Created: 2021-06-27 15:22:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 606164058bdb861010ed379a3e50a22a SHA-1: 1fec47f9419642a9ae95b56bddfc6c3fdb25b408 SHA-256: 10ec677c902b1265f54b9d965ea38f6481116ea95c6108ce6d0adb6d611c87a8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure. The document body and extracted URLs suggest a lure for free in-game currency (Robux, Coin Master spins) to trick users into visiting malicious sites. No scripts were extracted from this sample, but the presence of malicious redirector links indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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.co/app/431946152/free-robux-pagina-oficial-game-hack In PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/robux-claimer_GM431946152.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/diamond-modz-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/how-to-hack-roblox-with-cheat-engine-67_GM431946152.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/faces-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/roblox-item-hacks_GM431946152.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/how-to-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/robux-offer-wall_GM431946152.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/free-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/free-robux-real_GM431946152.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.naizak.com/uploaded_files/userfiles/files/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32FB 22720 bytes
SHA-256: c6d60ed9465f93fd046b88533d6eb76bfc220a4cdfdc4d7072bd0b62a3c6fb73