Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef486be5a569eee0…

MALICIOUS

PDF

35.8 KB Created: 2021-06-28 06:21:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7eb0a45ad2a3e35039def284cf04ecc4 SHA-1: 10cb4bd9458d08065888de7696687a86942ca25e SHA-256: ef486be5a569eee0b24aff298f0050a59aaab6c435ab3ea4c339f9feb8ae8292
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external resources, including a known malicious redirector at http://netcdn.co/app/431946152/como-hackear-roblox-adopt-me-2021-game-hack. These links are presented as "game hacks" and "generators", indicating a social engineering lure. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the embedded URLs and the nature of the lures suggest a phishing or malware distribution attempt.

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 http://netcdn.co/app/431946152/como-hackear-roblox-adopt-me-2021-game-hack In PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/roblox-prison-life-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/download-hack-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-do-i-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/cheat-qui-dupli-sur-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/the-roblox-game-and-online-free-without-login_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-ios_GM431946152.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/roblox-hack-999999-robux-2021-pc_GM431946152.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/moonactive-coin-master_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
font_00_sfnt_off0000316d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316D 22676 bytes
SHA-256: 739c8ae6df8277d9441388c13452150ce1c485cea95de00a5739e42609cf41cc
font_01_sfnt_off0000642c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642C 19968 bytes
SHA-256: a8d59eebe88f68d87a2b988f188126a1819508426f330e83bf3c38f7368514e6

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