Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9659c7f59f3987…

MALICIOUS

PDF

35.2 KB Created: 2021-06-30 10:59:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3693f73013646f5ee397ce62a0d4059e SHA-1: e80b655b01efb24227d261c53af20cefe60001cc SHA-256: cd9659c7f59f39871bb6287e1d501e554a1cae1e85079a9b0ef1b103ed5e9eb5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links that redirect to a malicious site offering 'free Robux hacks'. The document body explicitly mentions 'Secret Robux Hack' and includes a primary malicious URL. The presence of multiple redirector links and the ML classifier's high confidence score indicate a strong likelihood of this document being used to deliver a malicious payload, likely through a drive-by download or a fake download page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/secret-robux-hack-subscribe-to-make-it-works-game-hack In PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/robux-hack-download-ios_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/hacks-for-v-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-juego-hackear_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-hack-instalar_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-hack-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-hack-cheat-engine-67_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/new-free-roblox-hack-rtfsplorer-level-7-explorer-op-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-get-free-robux-and-tickets-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/play-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/fames-roblox-hacker_GM431946152.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_off0000302d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302D 22924 bytes
SHA-256: e693181bf208236931bf846d908825a6327ce2898b92ddfb259506150f1a1b1b
font_01_sfnt_off000063a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 19340 bytes
SHA-256: 9d1c870b7da0798bc5956f6f13a168de1c891d6d7473305a227e794e38967c8e

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