Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab90816f3700504…

MALICIOUS

PDF

35.4 KB Created: 2021-06-26 14:19:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 903d48d4ec1cfc0fa2ccce242a74bf55 SHA-1: ab2d79852bfa25d5f7869a405a03f22e310cb622 SHA-256: 4ab90816f37005047171c0701bebb257d25b05daf7ccd43ee9cf4ebfdd1faec1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded links, with a primary URL pointing to a 'roblox-cheat-engine-hacks-download-game-hack' resource. This, combined with the 'PDF_GAME_HACK_REDIRECT_LURE' heuristic and the presence of a visual download button lure, strongly suggests a social engineering tactic to trick users into downloading malware or visiting a malicious site. No scripts were extracted from this sample.

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-cheat-engine-hacks-download-game-hack PDF link annotation
    • http://www.nelsonssales.com/media/storage/editor/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-clicker_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-the-quarry-fire-crystal-hack_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-on-roblox-robuxian-hack_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/robux-hack-2021-generator_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_off00003047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3047 23236 bytes
SHA-256: 5872751c86fbab0f8dd531b1a25e5af93be29c85c4b82f5106297b47d10a8f63
font_01_sfnt_off000063b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B3 19552 bytes
SHA-256: 5faadd3561d714697668636c06c58155e6e90bc194aad390aa77acac75ef089b