Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d9bfb12f086ab07…

MALICIOUS

PDF

34.8 KB Created: 2021-07-01 13:43:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4abd0c6a877a4e89e3e3b4ba4732ac2c SHA-1: 76474a031b9feaa5209d6473c49c3937aeb86953 SHA-256: 1d9bfb12f086ab07f6d0a8d69b09f6501a6fb01e2b5824cb910b2c5be48c74d0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, that lead to pages promising free in-game items and currency for popular games. The ML_NYX_PDF_MALICIOUS classifier also flagged this document with high confidence. The document body contains a direct link to 'http://netcdn.co/app/431946152/how-to-get-free-clothes-on-roblox-using-codes-game-hack', suggesting a phishing or scam attempt to lure users to malicious sites.

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/how-to-get-free-clothes-on-roblox-using-codes-game-hack
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-free-minecraft-windows-10_GM479516143.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/get-free-robux-by-watching-ads_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-hack-roblox-servers_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-android_GM406889139.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/get-robux-com_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/master-coin-free-spin-daily_GM406889139.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spin-link_GM406889139.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-no-verification-required_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/apps-for-free-spins-on-coin-master_GM406889139.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/facebook-coin-master-free-spins-link_GM406889139.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-apk-hacked-3526_GM406889139.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/minecraft-java-edition-code-free_GM479516143.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-spin-pattern_GM406889139.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/robux-game_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-iphone_GM406889139.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/bloxpage-free-robux_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-roblox-exploits-that-are-safe-v3rmillion_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f93.bin
158ededc4919e2e1c22a20ab87b9f239686f4453d3c87faeaa3f40ef422e1f6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F93 22660 bytes
font_01_sfnt_off00006234.bin
efe3f32b0371f302e873b09c4482206ca65a064804807e2ae888b1a90e1883fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6234 19376 bytes

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