Malicious PDF — malware analysis report

Static analysis result for SHA-256 548bb5a6b6bd8a25…

MALICIOUS

PDF

33.2 KB Created: 2021-06-29 20:45:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9b6de918284d7ea4238ce29f564c5983 SHA-1: e8a27ccb9e21f1b572100fd1572c6eeb1e442d1b SHA-256: 548bb5a6b6bd8a2524ab4a6457bfbb6839cb2372a0501f965a5c3d1966e31f95
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly indicated maliciousness, and the document body contains numerous URLs related to game hacks and free items, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the document's theme point towards an attempt to trick users into downloading a second-stage payload, likely disguised as a cheat or hack for popular games.

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-r-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/rs-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pokemon-go-free-friends_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/youtube-free-robux-hack-glitch_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/tiktok-free-100-followers_GM835599320.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-paid-roblox-games-for-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/rise-of-nations-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-para-robux-gratis-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-segway-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-codes-2021-september_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-robux-code-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-items-2021-thumbnail_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-mod-apk-35-8_GM406889139.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_off00002ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE7 22112 bytes
SHA-256: f99585cf49a05a9ae785a6a79750bb6107eafd2c52decd774fd1bb497cb3751f
font_01_sfnt_off00005dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCE 18652 bytes
SHA-256: 3b7ad0687cc38916e9ed387441e9d99f27df67e188eb0367be00fbed64432edc

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