Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3c7368c0744226…

MALICIOUS

PDF

44.1 KB Created: 2021-04-23 14:46:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1aef38364ae7df9077068dce3c18c2c1 SHA-1: bc59681523eb5437f4e40ee6d8304525da21f6d6 SHA-256: ea3c7368c0744226fba3d33956eabe03b075a631604243abba4e5f906f191cbc
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based 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 0.9868

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://netsecure.top/app/431946152/youtube-free-robux-hack-2021-hurry-before-roblox-patches-it-game-hack PDF link annotation
    • http://library.itekes-bali.ac.id/repository/how-to-legally-get-free-robux.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hacks-for-roblox-gods-of-elements.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-paint-roblox.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-knife-capsules-check-cashed-v3-speed-hack.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-scarf-on-roblox.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-roblox-on-mobile.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/comment-hacker-sur-roblox-pc.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-codes-toys.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-ultimate-robux-on-roblox.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-medieval-warfare-reforged-hacks.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003fec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3FEC 26036 bytes
SHA-256: 38268bd1763c9d1b65669b2fb24ea0af91168cb7e221cd79be9a25da3601f66d
font_01_sfnt_off00007c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C79 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off0000863b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x863B 19656 bytes
SHA-256: 2e0d0a87485a42a8877a33cfeb9f51dc8963c7ab4ec9adb424fa7233ca475564

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