Malicious PDF — malware analysis report

Static analysis result for SHA-256 efb09934ebe6bfed…

MALICIOUS

PDF

44.2 KB Created: 2021-05-13 16:22:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 56f3eb5602c91f4d06b437194a250242 SHA-1: e1f433a01d9017761e56a9034e77ab9e1586c7ca SHA-256: efb09934ebe6bfed48658878ef88c18139e0bf674a7167eb4b9ca837fb9650c8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a known malicious infrastructure, specifically advertising 'free generator / game hack' content. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/hack-coin-master-apk-download-game-hack In PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/_GM479516143.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • http://elearningku.mts-muhajirinsby.sch.id/__statics/gudangsoal/files/get-free-robux-without-human-verification_GM431946152.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_off00004a1d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1D 28128 bytes
SHA-256: d33cdd512364de0db5c124771646c2eb817a810279e701b0d071703d0cb31168
font_01_sfnt_off000089e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E7 18472 bytes
SHA-256: 510233c67cf4ba9c46367cc2e914fc333a34af58cbf3c60531bd57bb691a7431

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