Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5ce5eb6493e0d1…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 07:52:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0917def5c9230fcc9d2c5a2e362d2dc5 SHA-1: 93f05d1e3bc9f71aadce7f0fb6f351aac1761ddb SHA-256: da5ce5eb6493e0d16bbfdd3041845a2f92f15df5c4b04e27cd2490c7dd433cbd
122 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. It uses a LOLBin command-execution lure. 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 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/boku-no-roblox-remastered-hacks-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/roblox-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-commends-on-roblox-innovation_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-free-youtube-aspire_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-vip-on-any-server-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/ro-cash-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-online-demo_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-speed-hack-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hacking-curleyhairs-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-glitches-and-cheats-for-lumber-tycoon2_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-dominus-roblox-javascript_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-hair-in-roblox-girl_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-outrageous-builders-club-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-hack-on-computer_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-group-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://digilib.stimlogIn macro / runtime command snippet
    • 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_off00003280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3280 22140 bytes
SHA-256: e3e3edc2b9a500deb5d566daee6dda04cbe057e107de96f6ebaa0b3e0e909147
font_01_sfnt_off000063a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 19336 bytes
SHA-256: c31d4dd7d13192c7f9df43bec9ae690143ef5b50ba9d103f9d1191ccb165e8bc

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