Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff411a8d3b0b358…

MALICIOUS

PDF

45.7 KB Created: 2021-06-11 12:37:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e10e887fe0a914a5d2b3cb8f6c517f95 SHA-1: 10df7c29b7d817daae361cb5ea7e0bc79a72196f SHA-256: 0ff411a8d3b0b3589d211d876485f6150b6431a6583dcb750ee63c5a0580a002
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links pointing to websites that promise free game-related items, suggesting a phishing or scam campaign. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external links, and the ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the structure and embedded links are indicative of a malicious workflow designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/free-name-snipes-roblox-game-hack PDF link annotation
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/download-roblox-on-ps4-free_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/roblox-how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-roblox-beanie_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/roblox-hack-no-scam-robloxian_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/how-to-get-stuff-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/roblox-script-cheat_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn15ciamis.sch.id/__statics/gudangsoal/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000543e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x543E 25596 bytes
SHA-256: 6b4112c757cde277f5557ac7354f38f8ef84bc2ae8226e4c44c41894cfc91ead
font_01_sfnt_off00008ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBC 18732 bytes
SHA-256: 6282cfa7ba9faf2b9086924bccaab779128bc3ad1b44e2b55dd416e34c9e54b2

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