Malicious PDF — malware analysis report

Static analysis result for SHA-256 727077136ef2b7a9…

MALICIOUS

PDF

34.7 KB Created: 2021-06-28 09:24:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 35cc73c3128f1f1a9eff0375cd85ecee SHA-1: 907274fd43ad213a6b8a189dbcfea71237c145f4 SHA-256: 727077136ef2b7a95a81e5d3293d5a43fe1dfa751e630f2a10c85069285b3f3d
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/roblox-xbox-free-packages-game-hack PDF link annotation
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/descargar-hack-de-robux_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/free-robux-no-password-easy-obby-june-2021_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/roblox-source_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/hack-menu-exploit-script-roblox_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/pubg-uc-dundle_GM1330123889.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/free-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/are-games-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/cross-site-scripting-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dallahgrp.com/uploaded_files/userfiles/files/coin-master-hack-trick-2021_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_off000031aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AA 22184 bytes
SHA-256: 6cc421cf1fb63781e72ff65a978f9f38d5ef93f5f3122f1574f315526709fe82
font_01_sfnt_off000062b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B4 18976 bytes
SHA-256: 1c18c0b57047fcbd8495bb6f060c7ddb43437506f0692ed6a01f97e49ddbd560

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