Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e892b6d21f9f90…

MALICIOUS

PDF

35.0 KB Created: 2021-07-01 17:29:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 94bb15fdb91c18d4d9696f8fbdc4a0ea SHA-1: 68a10bf5287f46b3b9474318bef4205debf69e15 SHA-256: a1e892b6d21f9f901d27487f1af9ea47fd0048c984ce2ba05bea4802622a03d1
100 Risk Score

Malware Insights

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

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a lure for game hacks. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a visual download button further supports the social engineering aspect of this attack. No scripts were extracted, but the document's structure and embedded URLs indicate a phishing attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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/increible-hack-robux-pastebin.com-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/dll-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-hack-glitch_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/am-i-being-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-1-hundred-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-console-inspect-command-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/when-tiktok-free-views-and-likes_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-in-game-money-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/earngg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-amera-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-no-human-verification-on-mobile_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-rape-cheat_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-free-spins_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_off000030a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A4 22312 bytes
SHA-256: 825fcf7fe5edad0c60a0f8475ee4f07c0e30b4e1120de9ea4fbf611f4583c865
font_01_sfnt_off00006270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6270 19500 bytes
SHA-256: cac975f648a824f836497b9602ea0f3121faaadb59980ea38b3eb299a6dbdb73

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