Malicious PDF — malware analysis report

Static analysis result for SHA-256 f031056bd121eb2b…

MALICIOUS

PDF

42.9 KB Created: 2021-05-10 15:34:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 98404dd72a4b77b501b90bfaedde7951 SHA-1: 1db54319b5336ac7496a519d9cef9a90c57f4797 SHA-256: f031056bd121eb2b8643978f208dddee4e1b5c0bde2332bf0d1b6ace6f795c83
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, designed to lure users into clicking for game hacks. The primary malicious link is https://netcdn.xyz/app/406889139/free-coin-master-spins-daily-game-hack, which is part of a known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering tactic to drive users to potentially malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-daily-game-hack In PDF document text
    • http://www.library.smactf.sch.id/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/coin-master-game-free-spin-download_GM406889139.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_off000049e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E2 25976 bytes
SHA-256: 60b319d537b34b6fe98f44d62d4e72189100a1a1f6622fe04db579e9cb59fa0b
font_01_sfnt_off00008535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8535 18308 bytes
SHA-256: 55b350ba652cc81c58cde26cd3be3a49d0b7ceb69ba015e6646fbbf561effc1c

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