Malicious PDF — malware analysis report

Static analysis result for SHA-256 a564d58b1001d6d3…

MALICIOUS

PDF

35.5 KB Created: 2021-07-06 01:00:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 104ea60ad6903741f937168d08605de7 SHA-1: 0af8644a756abeed0f4e14c79d865f3ad03d6cbf SHA-256: a564d58b1001d6d33ed3affe69509aa5ecb993fb8a735ddeeb262d007d4cdbda
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are related to obtaining free Robux or game hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a malicious intent to drive traffic to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the document's structure and content point towards a phishing or malware distribution lure.

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.tw/app/431946152/how-can-u-get-free-robux-game-hack
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-codes_GM431946152.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/one-piece-millenium-roblox-found-a-hacki-book_GM431946152.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/free-robux-generator-ad_GM431946152.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/roblox-hack-ios_GM431946152.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/free-trials-for-explots-of-roblox_GM431946152.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master_GM406889139.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-inspect-element-2021_GM431946152.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/minecraft-112-hacked-client_GM479516143.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/minecraft-pe-free-download-android_GM479516143.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/how-to-hack-into-anybodys-roblox-account-in-5-minutes_GM431946152.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/free-texture-packs-for-minecraft-pe_GM479516143.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/free-spins-coin-master-without-survey_GM406889139.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/free-robux-working_GM431946152.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-coin-master_GM406889139.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/roblox-full-version-free-download-apk_GM431946152.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/moonactive-free-spins_GM406889139.pdf
    • https://elearning.man2kojam.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-free-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003241.bin
252006a8a14b1a192a74cfcda04aabc0acc59b12d8e5266f901afdf1a4ad2d70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3241 23348 bytes
font_01_sfnt_off000065d8.bin
4698faf456f89a42db1aab957ed0472ea92275296e6b47032fd7fe1dc79199a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D8 18984 bytes

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