Malicious PDF — malware analysis report

Static analysis result for SHA-256 66819b3cf24b3893…

MALICIOUS

PDF

34.8 KB Created: 2021-06-29 21:13:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7a4bc473317c83088a9feac80cf22a29 SHA-1: d20e229d507a8b3f54a48a96df3a4a09c1e12eef SHA-256: 66819b3cf24b389302215b95430d1c7875e01a77ef319c925e13c1c9af10c9f9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirectors, specifically advertising game hacks and cheats for popular games like Roblox. The ML classifier and critical heuristics strongly indicate malicious intent, likely to lead users to phishing sites or download further malware. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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/roblox-phantomforces-flame-cheat-game-hack In PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/kachifpro_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/hack-roblox-winrar_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-hacks-2021-augest-7th_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-upgrade-free-download_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-codes-gift-card_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-surveytool_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/getting-free-robux-on-a-website_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-funny-roblox-shirt_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-hack-github-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/expliot-box-for-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-descargar-hack_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-all-games-hack_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_off00002f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F47 22896 bytes
SHA-256: 63047b15af3f888c41909b5b0f966425bd7e4769d2c844be9c7531a7494b4eba
font_01_sfnt_off0000626f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626F 19336 bytes
SHA-256: ddab934ee36c5cf4c7146ef8cd3009854ea02d6d27f63e94a1552b097b9d6c1c

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