Malicious PDF — malware analysis report

Static analysis result for SHA-256 537c584e5bec91f3…

MALICIOUS

PDF

47.3 KB Created: 2021-06-04 01:53:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c4b3c09632938d9a59a81e52e334e5c1 SHA-1: 6c01ca6d921d780c198ec99f338ce191178e122c SHA-256: 537c584e5bec91f3eed04858b9846b465f1c624c1b562bc955d52b58ce53738a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free spins, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious. The embedded link, https://netcdn.online/app/406889139/daily-coin-master-free-spin-link-game-hack, is likely intended to lead to a further stage of infection or a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/daily-coin-master-free-spin-link-game-hack PDF link annotation
    • http://digilib-pps.unja.ac.id/repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-spins-youthnow_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005222.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5222 25620 bytes
SHA-256: 7842e8e6c7b060de5bdc58de36fcd64c108cb1d7009cbb6764afd2fd73e6abbb
font_01_sfnt_off00008b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B82 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off0000956d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x956D 18476 bytes
SHA-256: 0e8ff706f766ebeac8fd51df3b46864e48e50accc558ba14dc70aa8347bf43ac

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