Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03cbacbf4fa91d8…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 11:11:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 42edf6fcfcfea956eb7f03975a195665 SHA-1: d2fc7ecaa3e793fb77748c2ae4588386bc848ed0 SHA-256: b03cbacbf4fa91d8e1afa33c66f906cd8b7df20c48921763ebef1e63325edea0
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/roblox-speed-hack-game-hack PDF link annotation
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hacks-de-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/app-hack-online-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hack-day-z-2-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/loith-gaming-free-robux-no-waiting_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/robux-hack-no-offers_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/explode-hack-roblox-script_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-phantom-forces-hack-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-hacks-scythe-download_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/is-there-a-way-to-get-free-bc-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/cheat-pekalongan-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-free-drawing_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-best-hack-for-prison-life-v2-0-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/blue-boy-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-hack-tap_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-app-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hacks-for-roblox-case-clicker_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_off00002e57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E57 22700 bytes
SHA-256: 5b51978e01677f58fa2f40590b1fbd531375a48e64e5809b24b4e0f73371efcf
font_01_sfnt_off00006163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6163 19008 bytes
SHA-256: 0d35cfadd0fca3b252b73fcf83046c0556c80fc1b3ae89449d52291489f63b0a

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