Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f7378e00a3d9a7…

MALICIOUS

PDF

46.4 KB Created: 2021-05-15 01:41:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fe70c4a50a8d6d23ad21735ddd06942c SHA-1: d3d9ff2b2b5f1475039418ff7bc2a8db2aa7865e SHA-256: f1f7378e00a3d9a7051270785509b81f447a635ecbb99f6b94cc92ff567c8a33
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 'free robux' or game hacks. The primary lure URL is https://netcdn.xyz/app/431946152/roblox-army-free-robux-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/roblox-army-free-robux-game-hack In PDF document text
    • https://zszolesno.pl/images/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://zszolesno.pl/images/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://zszolesno.pl/images/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://zszolesno.pl/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://zszolesno.pl/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://zszolesno.pl/images/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://zszolesno.pl/images/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://zszolesno.pl/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://zszolesno.pl/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://zszolesno.pl/images/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://zszolesno.pl/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://zszolesno.pl/images/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://zszolesno.pl/images/earn-robux-websites_GM431946152.pdfIn PDF document text
    • https://zszolesno.pl/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://zszolesno.pl/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://zszolesno.pl/images/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • https://zszolesno.pl/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://zszolesno.pl/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://zszolesno.pl/images/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • https://zszolesno.pl/images/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://Buy.HoaxMC.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B07 26032 bytes
SHA-256: e90d3b46196c3b4e9c11b13da62ea9535825175fcde2a75c81a764dfa573172d
font_01_sfnt_off0000873b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873B 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00009265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9265 18528 bytes
SHA-256: 3fb3182e9b0518fecce2d6326c4443e9fc052433b5a2fc23416796f92e2510b3

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