Malicious PDF — malware analysis report

Static analysis result for SHA-256 5839d48164cab98a…

MALICIOUS

PDF

36.1 KB Created: 2021-06-19 15:58:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3bb396eeaaf10b6a6abf0d70429aa1e9 SHA-1: 0893d77a0621a99b97256ef20c81661d6329812e SHA-256: 5839d48164cab98a7fe3bf465ade534b803956524ecda90dcbfde940061356bf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to websites offering game hacks and free currency, such as 'roblox-free-robux-without-verification-game-hack'. These links are flagged as malicious redirectors, indicating a likely attempt to lead the user to a malicious site. The document body and heuristics strongly suggest a social engineering lure for potentially harmful content.

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/roblox-free-robux-without-verification-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-for-rocitizens_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-de-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/collect-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/pepsi-hacks-roblox-script-cbro_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_off0000332c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x332C 23104 bytes
SHA-256: 30f1602ab69170a5c92ea0a4b32e4b7c747d0cf229dbd57d512f0a458fdbaf0d
font_01_sfnt_off000066fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66FC 19512 bytes
SHA-256: 1bf53e7d65a7464b3e3014351b1a88d9a34e98ebf56964605105628a6898a6fa

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