Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8cd5cfb243b4a3d…

MALICIOUS

PDF

35.0 KB Created: 2021-06-26 03:53:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f287ae09941619353b5620a328736695 SHA-1: 76bfc1e1a79af4c4862ddf5dcd7c693a5ec6f310 SHA-256: c8cd5cfb243b4a3dad378f3888e0e6a3d8ac2d5a873886cbc67be4b3981b82da
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and document body text that explicitly mention hacking and obtaining free currency for games like Roblox. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that a primary URL leads to known malicious redirector infrastructure. While no scripts were extracted, the presence of malicious links and the lure of free in-game items strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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/how-to-hack-somebody In PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/furious-crafter-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/pokemon-go-free-coins-no-human-verification_GM1094591345.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/cheat-engine-bypass-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/phantoms-forces-roblox-hack-weapon_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/minecraft-pe-hack-client-ios_GM479516143.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_off0000319b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319B 21960 bytes
SHA-256: c8e41bcf80e304e57c6cb554f19fee86aca74082838eb8ad53cf94acfbf5dd18
font_01_sfnt_off00006236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6236 19496 bytes
SHA-256: 46084b74f5e0193e442fb173b927e8a8e0e3c71bb4aba3dad86e58e4e3be38b3

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