Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2464ba5bf00506…

MALICIOUS

PDF

31.2 KB Created: 2021-07-20 07:38:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c86b4df12ed8a63be88a42afc9151608 SHA-1: 84ec8d68156683006ae0b81af7ce1c55f4aeb764 SHA-256: fc2464ba5bf005062be73c80296c19b355f34be4a5634f2e576755d52693692b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that are flagged as malicious redirectors, specifically leading to a 'free generator / game hack' lure. The embedded URLs suggest an attempt to direct users to potentially harmful content or malware downloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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.tw/app/479516143/minecraft-free-android-game-hack In PDF document text
    • http://www.studiolorenzale.it/lorenzale/ckfinder/userfiles/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://www.studiolorenzale.it/lorenzale/ckfinder/userfiles/files/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • http://www.studiolorenzale.it/lorenzale/ckfinder/userfiles/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://www.studiolorenzale.it/lorenzale/ckfinder/userfiles/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.studiolorenzale.it/lorenzale/ckfinder/userfiles/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.studiolorenzale.it/lorenzale/ckfinder/userfiles/files/free-views-tiktok_GM835599320.pdfIn PDF document text
    • http://www.studiolorenzale.it/lorenzale/ckfinder/userfiles/files/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • http://www.studiolorenzale.it/lorenzale/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.studiolorenzale.it/lorenzale/ckfinder/userfiles/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://www.studiolorenzale.it/lorenzale/ckfinder/userfiles/files/is-minecraft-free-on-xbox_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_off000029bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29BF 22464 bytes
SHA-256: 7ad7cb8c6d0459f66919039353606002141b224d6f07d99327b6b340df500c88
font_01_sfnt_off00005afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFA 17884 bytes
SHA-256: 82c3baf37781722f94369c3593b69e30ff14556e6fd52427afe75c94c9d4ce60

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