Malicious PDF — malware analysis report

Static analysis result for SHA-256 983c3f3808fd6cd8…

MALICIOUS

PDF

33.0 KB Created: 2021-06-28 02:49:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f89042cd4c625d988d0d1076f39337d3 SHA-1: 09ce0dde623501e8b04988de7882e96a52cd7c24 SHA-256: 983c3f3808fd6cd8bd465df3d3b8b15bb8c849ac47f84645940c4b2d13e51a79
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free Robux and game hacks, directing users to a known malicious redirector URL. The document body and embedded links strongly suggest a phishing or scam attempt designed to trick users into visiting malicious infrastructure. No scripts were extracted, but the overall pattern indicates a malicious document likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/how-to-get-free-robux-free-2021-game-hack In PDF document text
    • http://library.atim.ac.id/repository/free-robux-by-bananaman-2021-world_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/game-kit-free-800-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/project-alpha-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/extaf-live-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/fly-hack-dll-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-water-bottle-labels_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-play-roblox-liberty-county-for-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hacking-roblox-assain_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-promo-codes-roblox-body_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-spin-rewards_GM406889139.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_off00002a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A34 22192 bytes
SHA-256: 3c57086cee5a2d79b2f5860bbfd32e10b2b971e90a8c270a89e537d5e27a184d
font_01_sfnt_off00005ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD3 19384 bytes
SHA-256: 140efaa19506918d6e23c6f72929d04436b836b18eb9dc717a4a442c24a9fe38