Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4046a84ca591e1…

MALICIOUS

PDF

49.0 KB Created: 2021-06-09 13:31:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4cea7aca1bd50a718a105b08eaefb590 SHA-1: bd019dfc4c940fce8eb6f125663eb4829b2ecc92 SHA-256: 0f4046a84ca591e18e2c991ae3ff9f277f15f3575cff2fc7a8a23aab115db51d
102 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious lure, employing a link farm strategy to direct users to external sites. The presence of a 'download button' heuristic and numerous external links, including one to a 'free tag roblox game hack', suggests an attempt to trick users into downloading potentially harmful content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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-tag-roblox-game-hack
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/i-robux_GM431946152.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-get-free-food-on-coin-master_GM406889139.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-coins--spins_GM406889139.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/unlimited-robux-2021_GM431946152.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-get-free-golden-card-in-coin-master_GM406889139.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/roblox-help-free-robux_GM431946152.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spin-links-december-30-2021_GM406889139.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-links-for-free-spins-2021_GM406889139.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-pc_GM406889139.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-hack-https-coinms-net_GM406889139.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/get-free-coins-for-coin-master_GM406889139.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/minecraft-launcher-free_GM479516143.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-you-get-free-robux_GM431946152.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux_GM431946152.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-roblox-characters_GM431946152.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-hack-game-download-mod-apk_GM406889139.pdf
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005709.bin
bcacf0fedae950a9b9c7b52f9e33da0fe01485c11f4c6f37c3b746bb47ef532e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5709 26552 bytes
font_01_sfnt_off00009276.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9276 2880 bytes
font_02_sfnt_off00009c61.bin
b9ab0c59dffe7f02e28dbd6cc96d2beb644e8a6e7031274b08db3adb5bbe1c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C61 18464 bytes

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