Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d80377d95188ce…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 05:15:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d16ee537bcc3090f2f31ab9e7b1d820d SHA-1: 566795a13243facb7012940cdd32f1dd8da2f586 SHA-256: 82d80377d95188cea7e2066fa1d5bbde1b15c5e350db84e95d8f253629d9627d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically advertising free game hacks and generators. The primary lure URL is https://netcdn.online/app/479516143/free-minecraft-alts-game-hack. The document body, though heavily obfuscated, contains references to similar lures and the authoring application suggests it was generated programmatically, likely to host these malicious links. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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.online/app/479516143/free-minecraft-alts-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-cheats-for-robux-xbox-one_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/real-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/kachifpro_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_off0000518b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x518B 24640 bytes
SHA-256: 64d570c75ed0a58b5569b48ec13ae9723091a9769ab639c55e5b8609a95ad89d
font_01_sfnt_off00008a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A29 17644 bytes
SHA-256: 4350bb70586d7d356c834f80239bf16b03274066df9e9143be1036ee17eff588

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