Malicious PDF — malware analysis report

Static analysis result for SHA-256 292f648a4fdbf68a…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 05:17:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d0c8bbc838bb58333fd1d532a45446b2 SHA-1: ad16092c4335f484998c1422211d89033ea58f55 SHA-256: 292f648a4fdbf68ad292f92e77e8b7a6d1541cd2faa53fea7f993da991650a24
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an invoice-themed lure. 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 0.9865

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/479516143/minecraft-realms-free-game-hack PDF link annotation
    • http://digilib.pustaka.unand.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-boy-outfits-free_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.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_004_off00004fe1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FE1 24844 bytes
SHA-256: b8a98af790efbbf0f9e4c158b9d5dbc729042255e2f21399ee92cb9f3bc046f5
font_01_sfnt_off0000879d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879D 17900 bytes
SHA-256: badbc394cd8954733b164be5cc8c6ff402afbb9d7774d644eb4a8191a91f4c18

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