Malicious PDF — malware analysis report

Static analysis result for SHA-256 c555fdd51dc6d010…

MALICIOUS

PDF

36.8 KB Created: 2021-06-20 08:57:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9e08c2b437aeaf55c3c8601270e90367 SHA-1: 80b252adc4fbb025e3d3830bd7a8842787080848 SHA-256: c555fdd51dc6d010e33019c2bee8fddda75b92980e198478fe4e0e192c4f2dcc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it is a lure for game hacks and password crackers, specifically referencing Roblox. It embeds external URIs pointing to a suspicious domain, likely to host a malicious payload or redirect to a phishing site. The ML classifier strongly flagged this PDF as malicious, supporting the observed attack pattern.

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.co/app/431946152/password-cracker-roblox-download-free-game-hack PDF link annotation
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-do-you-be-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-script-hack-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-trial-builders-club-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-followers-on-tiktok-no-verification_GM835599320.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/cheat-engine-64-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/weird-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-hack-redline-v3-0-download_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-get-free-stuff-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-hack-roblox-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-hack-a-roblox-account-april-2021_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_off000036a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36A6 22768 bytes
SHA-256: adff632225d3ad515980c11c2820fe5b444b4dc61ba465561fb2bfce02ff101c
font_01_sfnt_off000069a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A5 19480 bytes
SHA-256: f9e692bbb4d7ca64484a9749e0527023c81442a58b9e55d8bfff8da6835d53f8

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