Malicious PDF — malware analysis report

Static analysis result for SHA-256 b33b3823791778a4…

MALICIOUS

PDF

35.3 KB Created: 2021-06-29 12:24:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ae8a9671a2d6442f41f8012cfe2e9f5a SHA-1: 26e0f9817b09311ee31b11f153cb6e04b343f56f SHA-256: b33b3823791778a4d3168531abdd835479974c33203ed0b30bd8baf2ed9e4641
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The document body and embedded URLs suggest a lure for free game currency or cheats, likely leading to further malware downloads or phishing. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious intent.

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/create-free-roblox-account-game-hack In PDF document text
    • http://repository.ummy.ac.id/repository/download-roblox-hack-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/2021-free-robux-202120210-working-legggggit_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/2021-hack-script-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-get-levitation-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-774-hack-download_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-make-a-robux-hack-code_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-roblox-games-to-download_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-robux-pastebin-no-wait-2021-may_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-hack-roblox-players-on-ipad_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-get-free-robux-on-roblox-xbox-one_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-get-bc-in-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-scp-foundation-model-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off000033a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A4 22588 bytes
SHA-256: f4069776f62f0a9ae24f2094c40e970d1647c9072bb9fe5fd6ce8fb519644f55
font_01_sfnt_off0000657e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657E 18896 bytes
SHA-256: 1163fb765488355712543dc6520937adf775d04ebd44867c46092d580cbaed9f

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