Malicious PDF — malware analysis report

Static analysis result for SHA-256 75485dcdbe5e73fb…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 17:02:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 212082c1bbb5ee1bc5152257df981a22 SHA-1: 2d8a61dc3844a5f0e5aea497175c893a0858d72e SHA-256: 75485dcdbe5e73fb00a2e9db5f1e5f4a0ac1a1a7128fa7b8854a3471a0b378b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a known malicious redirector infrastructure, specifically advertising free Robux and game hacks. The document body and heuristics confirm a lure-based attack pattern designed to trick users into visiting these malicious sites. The primary malicious URL identified is http://netcdn.co/app/431946152/free-800-robux-roblox-game-hack, which likely serves as a gateway to further malicious content or exploits.

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/free-800-robux-roblox-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-robux-without-downloading-anything-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coolest-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/exploit-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/autoclick-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-a-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-robux-clother-for-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-generator-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-shiny-charm-for-pokemon-brick-bronze_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
font_00_sfnt_off00003180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3180 22568 bytes
SHA-256: 640e2f7a3ba42d1af3d404b93b170867ca522c301f0080940065f0dce503dfd5
font_01_sfnt_off000063c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C0 19172 bytes
SHA-256: a53d6c5f76c8814746b2360fb104e7c3146aef114934fd1f34ab06aa0e30d6a4

Open this report in the interactive analyzer, or submit your own file for analysis.