Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef28c87f5087468…

MALICIOUS

PDF

43.5 KB Created: 2021-05-10 22:01:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ccb168d827a5037b2cbb6eeaaceaf7fa SHA-1: 6ae2a82c1294387663d77bf06ff22e1cd6c9b66c SHA-256: 6ef28c87f50874682e389327e8fb3b1dbb06c2e261d0f23cf982a646e1a07163
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting "game hacks" and "generators" for popular games. The primary malicious URL identified is https://netcdn.xyz/app/431946152/how-to-become-a-hacker-in-roblox-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a lure designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/how-to-become-a-hacker-in-roblox-game-hack In PDF document text
    • http://repository.ummy.ac.id//repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-com-hack_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
stream_003_off00004a7a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7A 26060 bytes
SHA-256: 531fdfb132df58662ee624a20c5cf66d0b2db1d32b86e3f3f7cfd7cff4c47994
font_01_sfnt_off000086b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B3 18608 bytes
SHA-256: 64431d83c1c466192ca6f90c953545fb4db60ca1c30fe2a26ad653d3315a559e

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