Malicious PDF — malware analysis report

Static analysis result for SHA-256 277fb68abe0745c3…

MALICIOUS

PDF

41.7 KB Created: 2021-05-16 18:36:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9ae7a80f549f150d2a600b26479455f4 SHA-1: 3a300573a05496983df282e2ae86bae2969b56c1 SHA-256: 277fb68abe0745c3e620fe238edf104beeee9e21f585f407c7053eaa8f2965ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game hacks and currency to entice users. It contains multiple links to redirector infrastructure, including the primary URL 'https://netcdn.xyz/app/431946152/can-u-get-free-robux-game-hack', which is known to host malicious content. The document body and embedded URLs suggest a phishing attempt for game-related exploits. No scripts were extracted, but the overall structure and heuristics point to a malicious redirector chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/can-u-get-free-robux-game-hack In PDF document text
    • http://agritrade-ukraine.com/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/google-moon-active_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-spins-for-coin-master-game_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
stream_003_off0000491e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x491E 23992 bytes
SHA-256: 1b65b07e4d5a53d9bc2a51e7e6b507e5fba08da9860445616f0d7cc6a6fe0f7a
font_01_sfnt_off00007fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA6 18532 bytes
SHA-256: 35bb0f01f69d1b5e790ed5f4c0eeb98998139975dc1eb58b588dc01b9002bbc1

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