Malicious PDF — malware analysis report

Static analysis result for SHA-256 b82bc1f187f247ef…

MALICIOUS

PDF

33.5 KB Created: 2021-06-29 17:49:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d452dbdc620b3d2b34142c1b859c594b SHA-1: 1caa27a764de34bcc2f4c24ba5965b27084ceca7 SHA-256: b82bc1f187f247ef7e9f630edb47b24e777fa5fc4d4aa175290eb201cf117241
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to websites offering game hacks and free currency, such as 'Roblox Hacks How To Get Free Robux 2021'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this lure, and the ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-hacks-how-to-get-free-robux-2021-game-hack PDF link annotation
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-your-hacked-roblox-account-back_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/como-ser-hacker-en-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-hack-into-someones-roblox-account-vermillion_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-gold-chain-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-roblox-exploiter_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/rbx-earn_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/aimbot-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-without-verification_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_off00002c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C3F 21804 bytes
SHA-256: 237ae828979d87f448e12999798a81578c0cb1ecf3e62e6b81add37fdccd2ef4
font_01_sfnt_off00005c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4B 19628 bytes
SHA-256: 0d0f55822f522668d604c5056315caf1e01e66a6e15b0776971582e8b8c9d270

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