Malicious PDF — malware analysis report

Static analysis result for SHA-256 51d933056941e699…

MALICIOUS

PDF

45.8 KB Created: 2021-05-16 12:39:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ac7ba08de2eaf8e127b1f6c3cf58c1b7 SHA-1: ac08d8c820497281af091c0f8afb240dedc2fe30 SHA-256: 51d933056941e699451e11c4170f4953c3983010cc8dafc38bc3ebdaa0b3772e
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, which leads to a 'game hack' lure. The document body and extracted URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the nature of the PDF and its embedded links indicate a high likelihood of redirecting users to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-spins-and-coins-for-coin-master-game-hack In PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/get-roebucks-com_GM431946152.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/link-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/roblox-money-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.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_off00004942.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4942 26992 bytes
SHA-256: 8f119c6887e40241f8b8b87cf52b42f44afe9e74e251f265cbe25a9368591b7d
font_01_sfnt_off000087a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A1 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9153 18060 bytes
SHA-256: d4954d2d00bde9f6a1061857a61d2c62c1ae360f44744af150ee923481526d51

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