Malicious PDF — malware analysis report

Static analysis result for SHA-256 21ee0f04a54809ab…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 12:25:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ba689f282dce7daaf88504c383680196 SHA-1: 91722632722eacd07c6c89a2c4d8955e2763d509 SHA-256: 21ee0f04a54809ab228b92cf6258b93050722202aeb42686fad640747ac0d228
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that promotes game hacks and cheats, indicating a lure for users to visit potentially malicious sites. The heuristic 'PDF_SEO_LINK_FARM' and the presence of many URLs suggest a link farm or phishing attempt. The ML classifier also flagged this PDF as malicious with high confidence.

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-to-hack-roblox-accounts-for-robux-game-hack PDF link annotation
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/free-roblox-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/how-to-hack-any-server-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/how-to-get-free-easy-robux-vortexx_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/cbro-roblox-hacks-june-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bkt.sch.id/__statics/gudangsoal/files/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3088 21932 bytes
SHA-256: 76c0c3473cce7e380a84454feb5667fbcdc0e1c92b5bcaf81f6964780a578586
font_01_sfnt_off000060c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C8 19228 bytes
SHA-256: c30d944de0a6baf9276c4865844fcb990da37fa04730b451441052e57c665125

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