Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09e3c6773a20b74…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 22:37:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 504cbc29125fd59222b43e5be326d18e SHA-1: c9421e729df9e0a162dbba375ee6cf01bd635589 SHA-256: c09e3c6773a20b745d2b48f7a78820ddf1ce7db9af5dbcd5b92869c38ed2c2ca
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-generator-game-hack PDF link annotation
    • http://www.pspmrsmkber.com/opac/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-get-a-million-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/hacker-wallpaper-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-god-mode-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/hacking-a-roblox-scammer_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-murder-mystery-2-modded-free-admin_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-do-you-get-free-robux-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-swords-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/pastebin-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-play-now-for-free_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_off00002f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7F 22100 bytes
SHA-256: 4bb91a49f0c7837343f42ef630448042792d537b0188b79a986e0b0a8e7b8360
font_01_sfnt_off000060ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AB 18984 bytes
SHA-256: 9ace3a26ef8593b997a2527bb5fc552eafd0119b2772e901bbb9c059dfbe5502

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