Malicious PDF — malware analysis report

Static analysis result for SHA-256 b553dda3b493fb03…

MALICIOUS

PDF

48.2 KB Created: 2021-05-14 05:09:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9d636b91c5bc7da07245838e15139555 SHA-1: b1b4d971823a8f883b4d0df194b7632f1124cbce SHA-256: b553dda3b493fb030dcc06353fb108ec79eb0984444082e96f8781d9c85beaed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hack generators or free in-game currency sites. The primary redirector URL is https://netcdn.xyz/app/431946152/roblox-ftw-game-hack, which likely serves as a lure to download further malicious content. The presence of embedded links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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-ftw-game-hack In PDF document text
    • https://farmaciadelbivio.it/images/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/free-robux-games_GM431946152.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/link-coin-master_GM406889139.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/robux-only_GM431946152.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • https://farmaciadelbivio.it/images/free-robux-no-human-verify_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_off00004651.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4651 38172 bytes
SHA-256: 22dba830cb8a810bd8f2f188a3631fa58da888c8681051e01e4b18298475cb51
font_01_sfnt_off00009ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB7 18216 bytes
SHA-256: 1d50de4617ba4833758eaeaefdb81b723ed2f26f16522b6b79df10ef9fbd4a9c

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