Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b3d93fcf6889899…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 10:42:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7a942b1895696155574e6d618b32b55a SHA-1: f5d36e473b62375a83e960dd1aa0016ae73bfd8e SHA-256: 9b3d93fcf68898996a469951105e48f3e906ebae268e209696666a9a21c80919
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure, promising free game hacks and generators to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or exploits. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links reinforces this assessment.

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/406889139/coin-master-hack-2021-free-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/hack-apps-for-roblox-video-pc_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-hack-tools-no-virus_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-btools-hack-mega_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/discord-free-t-shirts-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/hack-roblox-blob-simulator_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-hack-roblox-money-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-unlock-all-gamepass-free-pastebin_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-cheat-enginescript-injector_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-hack-apk-free-download_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-pokemon-go-accounts-level-30-2021_GM1094591345.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-vehicler-simulator-afk-money-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-sword-hack-script_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/hacks-phantom-forces-roblox_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
stream_002_off00003298.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3298 22464 bytes
SHA-256: 4ae2fdde6a7f156060ce5fb52567b53fb61495ab3a97ae9ea36d4e8d8667f37b
font_01_sfnt_off000064ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AC 18568 bytes
SHA-256: df7a437ec40fba4f049db35f275eeb7d22d786e3ebf47b4df0865a8e3590fb63

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