Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc74c201d3fe5b85…

MALICIOUS

PDF

46.6 KB Created: 2021-05-19 03:04:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0370032a323f0bd6b377ed4be1e1dcea SHA-1: fc6690bc4e2b57e77c5af1546c9dbddd707f4645 SHA-256: bc74c201d3fe5b85b347d800101fba1fda416ce257b0fa7c2416092a9d127b60
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising "free generators" and "game hacks". The primary malicious URL identified is https://netcdn.xyz/app/406889139/free-coin-master-spins-blog-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering lure to drive users to potentially malicious content or downloads.

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/406889139/free-coin-master-spins-blog-game-hack In PDF document text
    • http://lib.fekon.untad.ac.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/hacked-roblox-game_GM431946152.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_off00004bcb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BCB 30288 bytes
SHA-256: effb4ef321f510fb9c8ac5031b00a9277fbdabc6821d822c1a3840937956edd7
font_01_sfnt_off0000897c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x897C 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off0000932d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x932D 18464 bytes
SHA-256: a2c76306a813766f02d16bba13a6176cc917de49c90529db8e6e2ffa1e8149db

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