Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf96798c144c1fd…

MALICIOUS

PDF

42.9 KB Created: 2021-06-14 00:14:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e1a67214bc73703bb4c24b5330d7e727 SHA-1: 88bad6b4a0cf02d4ce4c0026cccf91ce3b91bc30 SHA-256: 0cf96798c144c1fd4fbf3138eb9cb108e79754f88168f25a7313d521df2bd628
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a 'free Robux' and 'game hack' lure to entice users into clicking embedded links. The primary link, http://netcdn.co/app/431946152/free-robux-no-verification-no-download-game-hack, is highly suspicious and likely leads to a malicious download or phishing page. The document's structure and embedded links strongly suggest an attempt to trick users into executing further malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.co/app/431946152/free-robux-no-verification-no-download-game-hack PDF link annotation
    • http://www.perpus.stfm.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-hack-999999-robux-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/pokemon-go-free-pokeballs_GM1094591345.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-free-clothes-cheat-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_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_003_off00004989.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4989 24688 bytes
SHA-256: 306d67104468a079ea2d35caf5890bca670d3cd51546417711cfd39815faa106
font_01_sfnt_off0000826b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826B 19180 bytes
SHA-256: 529ad809d39cb86513f1fd0a7c59ac13158e8644a31ce1f1c8620f9d5ad40971

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