Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b5eb38e2f55b186…

MALICIOUS

PDF

33.5 KB Created: 2021-07-01 03:37:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e42647a4d67a39e4584d27dfced2ad27 SHA-1: 1b8678c976915c9ff828a0d950600dc40ed83197 SHA-256: 4b5eb38e2f55b186c74a471b131b0faf17fc31c2bc752629e9207625f3dfa945
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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-new-cheat-engine-bypass-game-hack PDF link annotation
    • https://opac.itp.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-pics_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-brick-cars-cheats_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-roblox-not-blocked_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/500-rebirths-at-a-time-hack-magnet-simulator-roblox-script_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-free-robux-pastebin-javascript_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-robux-on-a-ipad-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-t-shirt_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/is-there-an-actual-real-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-free-bag-goku_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-robux-hack-without-offers_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_off00002df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF8 21408 bytes
SHA-256: b27e55bb8f78c5668a19e734c60bf734a48e1b29288b2ddb71fe51b95b893b99
font_01_sfnt_off00005cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDE 19396 bytes
SHA-256: 9316f9301a8a9adadbce959d8c5b5be34bf766116822e3eabe571f601ff0e06a

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