Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b61ad06d3cdec43…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 16:38:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a05593c94b6a48e5000d2aa07f90de2d SHA-1: d52f91a80e8ae874da67356f62135c5c588a0dfa SHA-256: 3b61ad06d3cdec43f383906f47b6f72d4fbee2a54660dbdbe47c777c7e0c6598
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.tw/app/431946152/robux-websites-2021-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/free-roblox-adopt-me-money_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-download-for-computer_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-games-to-download-on-pc-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/i-think-my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-a-free-roblox-necklace_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-tickets-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hawt-sauce-roblox-jailbreak-hack_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_off00003151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3151 22608 bytes
SHA-256: 0085160da719a66c97bfce3aa2fdd5e1f4a23a76178acb3f5fb70b514dd05de7
font_01_sfnt_off000063a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 19376 bytes
SHA-256: 8abac7f36f0f6ba9a6c410adf2bfd84174c2f93cc82f362ea9a5a51f34bdb61b

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