Malicious PDF — malware analysis report

Static analysis result for SHA-256 e365df1ca9d894ff…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 14:26:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 83afb4c9936ed678807fa9e62b3ed16c SHA-1: 2ed040dfbc1e5d3da9b0648314d8c6492baca4cb SHA-256: e365df1ca9d894ff4437d70075ff40917cfeb495f6cdf257b9c2bee49a5b4406
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-on-computer-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/roblox-cheat-tool_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/como-descargar-roblox-hackeado-para-pc_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-anything-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-scratch_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/dantdm-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-stuff-on-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-pants-black-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-use-a-cheat-on-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-comlu-com_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hack-icebreak-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-roblox-to-get-robux-on-phone_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
stream_002_off00002dbc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DBC 21708 bytes
SHA-256: 5906be01c489fe2f55cd06e69e043e24c615f8a0cf546c3e24f1c8cecf3b98d2
font_01_sfnt_off00005d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D75 19420 bytes
SHA-256: 4eeda5a53974dafe6a6a7eb0474e8c00647b290d21ead3df531c01c0ce008c20

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