Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56801b0fa3aec97…

MALICIOUS

PDF

45.7 KB Created: 2021-04-26 20:43:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cf2d516c0ed2044e32a53ddf5d115604 SHA-1: dfe4ff23adae22286dd4c8c26a1753410ee5d8a1 SHA-256: f56801b0fa3aec97d9c33310cdb7b2b19964638a974a09df7280236757e2b30b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites and other PDFs that are advertised as 'free generators' or 'game hacks', specifically targeting popular games like Roblox. The primary link, 'https://netcdn.xyz/app/431946152/welcome-to-free-robux-game-hack', is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9814

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/welcome-to-free-robux-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/roblox-hacks-on-lumber-tycoon-robux.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-money-in-mad-city-in-roblox-with-codes.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-codes-pins.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/zombie-strike-hacks-roblox.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-generator-no-survey-or-download-2021.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-skeptic-roblox.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-jailbreak-cheat-table.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/howto-get-free-robux-without-survey-and-verification.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-robux-free-on-roblox-2021.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-hack-roblox-owner.pdfIn 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
stream_003_off000040ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40EE 30168 bytes
SHA-256: 4d6110dc83a8961740079002181d3f381336b4e4d37aca6d193e906f1ef09502
font_01_sfnt_off000084e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E2 3312 bytes
SHA-256: 40bd8eebcb3a0d68a8646f1930e84f30a44bfa48525263c6c528f0bc1e9c1677
font_02_sfnt_off00009031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9031 18548 bytes
SHA-256: ed8efd75e6149a593c04d30db1b319c75dcbb48501823a25db833616cbd36a03

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