Malicious PDF — malware analysis report

Static analysis result for SHA-256 d176891e275f2ce3…

MALICIOUS

PDF

35.6 KB Created: 2021-06-29 10:20:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f6db91b277304e03bc145912ef38f61e SHA-1: 690ad533288f16f19d3e5e3d745139bcd106c75a SHA-256: d176891e275f2ce363e6ad647ff1381da91bd52e68f03e5e54274b432c8a4d43
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.co/app/431946152/comment-hacker-roblox-infinite-robux-game-hack PDF link annotation
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/become-a-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/free-robux-generator-witout-paying-or-doing-nything_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/free-robux-hack-mobile_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/how-do-hack-piano-roblox_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/coin-master-free-spins-hack-ios_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
font_00_sfnt_off00003424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3424 22236 bytes
SHA-256: e34580defb5f67f347bbda86997d6bd79337dd92097c5cd8b89b08e3108183fc
font_01_sfnt_off0000656b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656B 19280 bytes
SHA-256: 7d3fc364f686ff612f07c1b3ffa67c436de90747140ecfddf94ea7332205f79e

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