Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c4246db33524a9…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 21:13:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cb75584a16738ccf907b8b126d285314 SHA-1: 7657ff3232ac177598864d235e8c56d397e9118a SHA-256: 99c4246db33524a9efadce81f878222a1a296caf2648a38feb2f7686f94b23f4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of game hacks and free currency for Roblox to entice users. It contains multiple embedded URLs, with the primary one being http://netcdn.tw/app/431946152/hack-exploit-roblox-jailbreak-game-hack, which likely leads to a malicious download or phishing page. The ML classifier also strongly indicated maliciousness, supporting the observed lure.

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/hack-exploit-roblox-jailbreak-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/youtube-is-getting-a-roblox-account-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-hacked-client-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-hack-on-android_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/fencing-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-roblox-accounts-2021-wiki_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-and-tix-hack-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-2021-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/shiros-hair-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-t-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-witch-hat-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-game-pass-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-seniac-tshirt-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-4k-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/worst-client_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D2D 22520 bytes
SHA-256: e20cd0321c71ed2f519dcfc6317c43ebea6d445a4faa13ba095b941d109c6a2f
font_01_sfnt_off00005f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F71 19036 bytes
SHA-256: 83b04c0e395684451bb10d644a034b55f6a3644ab6543c366b09bc49379c32fe

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