Malicious PDF — malware analysis report

Static analysis result for SHA-256 784b7d1fbf26eb63…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 08:50:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f7958b6748d4960b631143cf8e107029 SHA-1: 8a271b0ffa44ef568d1f5fb8dcae2ab303ed82f4 SHA-256: 784b7d1fbf26eb638e6f5f8c949d250d295ab2dfa7c79b6ecd96a6fd7af9281b
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/406889139/free-game-pack-coin-master-game-hack PDF link annotation
    • http://www.pspmrsmkber.com/opac/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/bux-today-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-get-badges-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-2k-hacks_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/hack-roblox-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/natural-disaster-survival-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/real-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/script-hack-roblox-toy-simulator-inf-money_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/download-roblox-free-for-android_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/i-want-free-robux_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_off00003064.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3064 22704 bytes
SHA-256: 535d1da117293b4e98437df44da9850cc81eb8fdfedf4cedd8aa99b031cc4787
font_01_sfnt_off00006327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6327 18584 bytes
SHA-256: 62bc779e0b99637fb65005790219b661c5e73bb3231c875a940f476a7c72bbc0

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