Malicious PDF — malware analysis report

Static analysis result for SHA-256 da01c0075e838629…

MALICIOUS

PDF

49.2 KB Created: 2021-06-03 19:31:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2e38471c6a7462e95076a5900ba4911f SHA-1: 6bbfb20fc99f467217fd4e68a7051f7e2c8baeb2 SHA-256: da01c0075e83862928aea66dc907a9af7126e5883e22fb668658ee6db5ce10f1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to domains associated with SEO link farms. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that likely serves as a lure for users to click on further malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/406889139/cm-free-spin-link-today-game-hack
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/how-to-get-free-robux-with-no-verification_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/bloxawards-com-earn-free-robux_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/how-many-villages-are-in-coin-master_GM406889139.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/abd-roblox_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/pokemon-go-free-km_GM1094591345.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-roblox-hair-girl_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/how-to-get-free-robux-no-survey_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-hack-2021-ios_GM406889139.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-hack-spins-android_GM406889139.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-app_GM406889139.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-free-spin-group_GM406889139.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-hack-no-human-verification_GM406889139.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/links-for-free-spins-for-coin-master_GM406889139.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/how-to-hack-robux_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-robux-rewards_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-app-for-free-spins_GM406889139.pdf
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-spin_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005284.bin
a3aedc0e027a0aacdb0ab641c1a63ea7f9c36e567b34d818afca819a7e9ded05		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5284 27516 bytes
font_01_sfnt_off0000918e.bin
d66c4080ae284a9b4c30992c5983191aaa0a3e32d3a7f70f5d4649bf393320ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x918E 3264 bytes
font_02_sfnt_off00009cda.bin
25a2ee2baa32fb86b83e2840a58348e17ba7953b286ca82cf9f97985fc172f08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDA 18568 bytes

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