Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4dcfc0858c14948…

MALICIOUS

PDF

35.9 KB Created: 2021-06-18 03:23:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ff8cbbb6ad99dedebd20f330fd5e17f5 SHA-1: 77068c0375b66f0c01a980eadb32f17b36220764 SHA-256: c4dcfc0858c14948100bee98af44cb083061dbb83ac30801ff94b14546d0f109
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a malicious URL. The ML classifier strongly indicates maliciousness, and the embedded URLs suggest a redirection to a site that likely hosts further malicious content or phishing attempts. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a social engineering attack.

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/how-to-get-free-robux-2021-website-game-hack PDF link annotation
    • http://perpustakaan-stikesmsb.com/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/pubg-uc-zip_GM1330123889.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/zephplayz-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-tiktok-video_GM835599320.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-3d-modeling-software-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-use-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/codigo-hack-para-robux-inspeccionar_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_off000032fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32FB 22484 bytes
SHA-256: efb8b663e0e2c7f6df7d5b8c8deb16cafd4d3ff8e0e4432eb5897c468551a0d0
font_01_sfnt_off00006519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6519 19704 bytes
SHA-256: e6119cda75fd5a2605856c88dc34f22bcb082faebb7d3f6518f7b029c3c724cc

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