Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf815e959825c1a9…

MALICIOUS

PDF

35.9 KB Created: 2021-06-19 09:36:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 228cb7b516adc75c0d2305016b49a491 SHA-1: d4a35bf242e743b8ccedb5f59200725800f534bb SHA-256: cf815e959825c1a9d96b3fa71a0d646c4d41db9b05dff4fd9628509a82015a44
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free robux'. The heuristic firings confirm these links lead to known malicious redirectors and a general lure for downloads. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering attack designed to trick users into visiting malicious sites.

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/hack-chakra-naruto-final-bond-roblox-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/fulflex-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-valentine-generator-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-g_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-accounts-roblox-passbin_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/my-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-the-computers-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/can-u-get-hacked-buying-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-safely-one-a-ipad-lenovo_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/piano-keybard-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/spin-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-roebucks-in-roblox_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_off000033a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A7 22640 bytes
SHA-256: 60ffb69d06cbf38f8eb33b13b1700c9af36f7d20df73e2a0023121c5825485e2
font_01_sfnt_off00006610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6610 19524 bytes
SHA-256: 69cc658f53716cd01892e742b0d79467ffc8bfff9ff18862eacef679f75b06e6

Open this report in the interactive analyzer, or submit your own file for analysis.