Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb7a8f42454eb0d…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 13:53:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5946941f1ec5695f073a0a92e629aa58 SHA-1: aff5ba134d129bf1029ae188281b7e42cbf4f4cb SHA-256: 4eb7a8f42454eb0d27095ebbc528d632893c7fae3356674a5a91a4c5d1fc64d2
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are part of a link farm designed to direct users to sites offering game hacks and free in-game currency, such as Roblox and Coin Master. The presence of a direct download link and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading potentially harmful files. The document body and heuristics confirm the lure of obtaining free in-game items.

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/roblox-apk-hack-game-hack
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-spin-link-new_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/minecraft-free-download_GM479516143.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-robux-discord-servers_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-get-free-robux-for-free_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-get-free-robux-without-paying_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/hacks-for-coin-master-game_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/can-i-get-free-robux_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/roblox-2-player-tycoon-cheat-codes_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/roblox-website-robux_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/pokemon-go-free-8-bit-sprites_GM1094591345.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/minecraft-114-4-download_GM479516143.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-robux-app-2021_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-get-100-robux-for-free_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/heists-roblox-hack_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/roblox-hackeado-2021_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/pubg-4all-cool-20219-uc_GM1330123889.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f1d.bin
144ec16af58e41fe782bc701c68ca97a653e8e528a020eb059ed24769e602ee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1D 21724 bytes
font_01_sfnt_off00005efc.bin
4a54e3c0999d22341ed87b7a4ab614cdfd6f3715e6a9eb51b324e9e7408846b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFC 18832 bytes

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