Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f78921fb0e7939…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 10:31:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0e8a893a8ef2c9b313434518d13f9876 SHA-1: 4318dc6b5fca9a24290d379b2c0655f65b564b8b SHA-256: 17f78921fb0e7939c9bc1a872a3228372470d4c7e336ff52cddb9406e4746d4d
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, prompting the user to click a link to verify they are human. This link, http://netcdn.co/app/431946152/how-to-get-a-free-thumbnail-on-roblox-game-hack, likely leads to a malicious website or a download. The document's content and the presence of multiple game-related lures suggest a social engineering tactic to entice users into executing further malicious actions. No scripts were extracted, but the PDF structure itself is used to deliver the malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/how-to-get-a-free-thumbnail-on-roblox-game-hack PDF link annotation
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-robux-generator-no-human_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/www-roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-robux-bot_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/how-to-get-all-items-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/roblox-catalog-free-items-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/get-free-robux-without-hacking_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-cloths-roblox-codes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000300e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300E 21808 bytes
SHA-256: 35ae88dd5ba6550a664fef1c1b3487d4c1cd1ebd8fce2ec06592583d62fa4c9d
font_01_sfnt_off00006021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6021 19604 bytes
SHA-256: 6f99bddf6d3e5719d6b1b0fe4dc5b720e9a562e449eba1c4f942c630d333e6ae

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