Malicious PDF — malware analysis report

Static analysis result for SHA-256 357f00774a7ae9cf…

MALICIOUS

PDF

40.7 KB Created: 2021-05-20 00:00:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ca9e91594bc03a069a101fb2e414d2f8 SHA-1: f24e8692c626dbfbaf9dc3d9836d29eff75b2f7d SHA-256: 357f00774a7ae9cfe93f83a59fde80840b33b9554018119418c06907f92b0500
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' content. The document body and embedded URLs reinforce this lure, aiming to entice users to click through to potentially malicious sites. No scripts were extracted, but the presence of malicious links and the ML classifier output strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/835599320/tiktok-app-install-free-jio-phone-game-hack In PDF document text
    • http://librarystkippgribl.com/repository/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/robux-boost_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/pokemon-go-free-promo-codes-2021_GM1094591345.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/freerobux-co_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47F1 23144 bytes
SHA-256: 149ff4acc25ba06202f8f0af8d47e8b3c4e806b8489fa465ecf4047f5834119c
font_01_sfnt_off00007c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C37 18420 bytes
SHA-256: 8aa8607fbdd3b092d7e4dd13b692a4bb0c85cb26ab10a8e6b918909d5bccd055

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