Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a76f3127cf8b52d…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 14:21:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 659c712d3847cdced84f18da635b535f SHA-1: 85a2c42322105f51a0bfba169116fec4d2ca2f3e SHA-256: 4a76f3127cf8b52d7cc7117ecde5e1f577278fd602c647f8c4e3ef3374db3f82
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, with a primary lure pointing to 'master-game-game-hack'. This, combined with heuristics indicating a 'game hack redirector' and a 'download button' lure, strongly suggests the document is designed to trick users into downloading malware or visiting a malicious site. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.tw/app/406889139/master-game-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id/repository/roblox-name-script-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-shading-templates_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/hack-para-sharkbite-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-money-cheat-no-download_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-no-app-download-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/pubg-uc-alma_GM1330123889.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/pokemon-go-free-coins-ios_GM1094591345.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-items-in-roblox-using-toy-codes_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-cards-links_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
stream_002_off0000324f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x324F 22360 bytes
SHA-256: ce2c58d8beae96a7d9e73f9a5368b36e00306f8b7e1a1f36b777d159d15f8dd5
font_01_sfnt_off000063f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F6 17832 bytes
SHA-256: 1c46f7097915507bef71520753a2b966e3790489ee482f133dd7f7de59418767

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