Malicious PDF — malware analysis report

Static analysis result for SHA-256 625b47745e4226e7…

MALICIOUS

PDF

34.4 KB Created: 2021-06-30 00:57:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 048ad9ded7e782fcbc49d60c521645f9 SHA-1: 7812b2fc05a4a645353a3457659c10a2663e464f SHA-256: 625b47745e4226e73d8e255825154c6ffb5da2652d8e0caacf3d0d1807a44e86
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector hosted on netcdn.co, which is flagged as malicious. The document body and embedded links suggest a lure for game hacks or free currency, a common social engineering tactic. The presence of embedded URLs and the ML classifier strongly indicate malicious intent, likely to redirect users to a site that may host further malware or phishing 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/l-free-robux-game-hack In PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-online-play-hack-for-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-hack-roblox-surf_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/hacks-roblox-august-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-robux-codes-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-robux-no-survey-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-jailbreak-hack-not-noclip-and-no-viruses_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/zephplayz-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-hack-jump-unlimiteed_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/military-dave-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/hack-pour-roblox-apocalipse-rising_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-robux-survey-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-free-download-for-windows-10_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-project-jojo-free-vip_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/real-minecraft-for-free_GM479516143.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_off00003008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3008 22504 bytes
SHA-256: 0ce048f12037fefa7c74e05d7d39f34c67efa3ae350d12c2e6d5db9ff13a0e7a
font_01_sfnt_off0000623b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623B 18716 bytes
SHA-256: 5d7d056ffb865999c2b42fd16dbb618d6c63f33d45d7cd1cd18a4f4db2fc04a5

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