Malicious PDF — malware analysis report

Static analysis result for SHA-256 c408331af39bab79…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 05:31:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8f480dbcb067a58c02c36f04ea92efcf SHA-1: 35976b7156cc6e2d8c834eabb2817e7d2b7e1b00 SHA-256: c408331af39bab79f020b31832e76e727ff7a40aa82720764d4f07d764ea8e0b
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/roblox-prison-life-hack-game-hack PDF link annotation
    • http://www.pspmrsmkber.com/opac/repository/how-to-get-free-stuff-in-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-apk-hack-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-demon_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-free-robux-game-link_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/badge-giver-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-how-to-get-free-robux-september-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-jailbreak-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-get-free-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-no-human-verification-no-offers-generator_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
font_00_sfnt_off00003177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3177 22052 bytes
SHA-256: a18cbd05ec3f080326dcb60a30b9d1ef77547de57c9548a029b20284a5458142
font_01_sfnt_off0000625c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625C 18932 bytes
SHA-256: 757c592a10e4627f90624bfdd8f1127ea4c0f8f917493ad00ff1bc4f9e7f3eb7

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