Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05860f4104dc23e…

MALICIOUS

PDF

34.6 KB Created: 2021-06-19 14:49:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: de8981f689ba244c378e8130de5b8a87 SHA-1: ee2bf793ab9d99b065b61b70f796b57cc502ac50 SHA-256: f05860f4104dc23e09e7be1ac6341c3dbc691cc6753b3e68de2de314a137b77f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are part of a link farm designed to attract users searching for game cheats and hacks. The primary lure is "Free Robux Xbox 1", directing users to download applications from suspicious URLs. While no scripts were explicitly extracted, the PDF structure and extensive external linking strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-robux-xbox-1-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/cheat-engine-undetected-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-get-free-robux-in-1-second_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/what-is-the-secret-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-executor-2021-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-hack-tool-v1-9_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_off00003132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3132 22328 bytes
SHA-256: 88cb59cc40f71d9460640082b1d986a41d77fb931e5331d8cefbbb2108b376fa
font_01_sfnt_off000062d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D8 18820 bytes
SHA-256: ca206d673976e1f1c372894db3cb88f4638bb6cb55ed0d7e056cc01c65942933

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