Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf3bf15cc60318f…

MALICIOUS

PDF

34.4 KB Created: 2021-06-19 10:49:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 19dbe2c9ff387dd3c35d02d79d3c4cde SHA-1: 2ac5a0c332e9ad7436ac1ae5b70171b688986778 SHA-256: caf3bf15cc60318f2fe18a07f5743f7d4c0c0247b8caa1d5c74162a5a1670854
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'game hacks' and 'free currency'. The primary malicious link identified is http://netcdn.co/app/431946152/black-magic-roblox-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/black-magic-roblox-hack-game-hack In PDF document text
    • http://digilib-pps.unja.ac.id/repository/oprewards-login_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-hack-online-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-hack-in-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-make-roblox-ads-for-free_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/cloudbux-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-hack-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-game-card-roblox-codes_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-roblox-adopt-me-pets_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
font_00_sfnt_off00002f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3A 22712 bytes
SHA-256: cf35b9d536d8962a37bfa0ee552e949764653c7b08cb058f1c9de876323f5778
font_01_sfnt_off000061ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CA 18972 bytes
SHA-256: 7d6ee859f5f4385d8579486e27761312c70d2c7a2892e88d6af6608a2118f0fa

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