Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d8da71a6376c4d…

MALICIOUS

PDF

49.3 KB Created: 2021-05-12 18:43:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ad0e848e86859f3cdb3c80bed2e3ef60 SHA-1: 0ccc00cfd6e93452d15892c80c35ae74a54fd3d4 SHA-256: c1d8da71a6376c4dcb41544aedb11d8b030f27a9edbf298073e8c918bca690dc
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links to external resources, many of which are presented as game-related hacks or cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting an attempt to direct users to potentially malicious download sites. The ML classifier also flagged the document as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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.xyz/app/431946152/robux-game-hack
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-robux-that-actually-works_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/download-coin-master-hack-apk_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-heaven-free-spins-today_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-game-pack-with-google-play-coin-master_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-get-100-robux-for-free_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/roblox-free-download_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/lastrick-com-coin-master-hack_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-hack-coin-master-game-ios_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-links-to-get-free-spins_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-spins-link-download-hack_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-ios-hack-download_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coinmaster_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/hack-coin-master-32-mod-apk_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/roblox-gang_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/can-you-get-robux-for-free_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/do-you-get-minecraft-windows-10-for-free_GM479516143.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/hack-coin-master-free-spins_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/mcpe-optifine_GM479516143.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c5a.bin
319235a0c5f0b72e344a6bea601fdf7900dea637f87f488c68923f94e47c90fd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C5A 26016 bytes
font_01_sfnt_off0000889f.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x889F 2840 bytes
font_02_sfnt_off0000924c.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x924C 5696 bytes
font_03_sfnt_off00009f5e.bin
ccf20ca1ad80d0cd2f0d464461636129858ae353cf2c3769b35ef20048afdef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F5E 17852 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.