Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1fe5ff2d43dc2c5…

MALICIOUS

PDF

34.1 KB Created: 2021-06-29 03:20:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f971840cbaa60d18931ca11e4c4b498b SHA-1: 09fbbdf9915460e3c9700dda456e50dbedd9ffcf SHA-256: b1fe5ff2d43dc2c575dea40a3288a232cfe54644a9271e3debb83c5d8bdcc6ea
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/robux-hack-apk-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/roblox-papers-simulator-hacks_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hacks-roblox-royal-jelly_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-roblox-clothes-without-builders-club_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/where-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-bee-swarm-simulator-super-mega-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/dont-tell-anyone-about-this-free-robux-glitch-july-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-gift-card-no-scam_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/rbx-website_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-gravity-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-how-to-get-free-gamepass_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_off00002ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED5 22448 bytes
SHA-256: ce2b5ff3d3960293cdfe24964abc27ff1e513a1e13f9a87a0dee281f4cb9efd3
font_01_sfnt_off000060a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A8 18896 bytes
SHA-256: a9039cf005c676352a0975f80df600596b354ab5fe0953fedba1c165a7841c67

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