Malicious PDF — malware analysis report

Static analysis result for SHA-256 a100f3c54a803097…

MALICIOUS

PDF

34.6 KB Created: 2021-06-29 03:29:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 673bf1a710715a1d3267f17948ef32e5 SHA-1: e0e9a015084773ad0e19585606c028f99b898546 SHA-256: a100f3c54a803097ef6a1a08dbdc87b9be4454761da889b1fe8333028aec6004
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external resources, including a primary URL that appears to host a malicious script. The document body and embedded links suggest a lure for free game currency or cheats, a common social engineering tactic. The ML classifier and PDF link farm heuristic strongly indicate malicious intent, likely to download and execute a second-stage payload.

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/free-robux-hacker-typer-script-game-hack
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/do-coin-master-hacks-work_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/but-link-says-free-robux_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-admin-roblox_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-account-roblox-with-robux_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-without-human-verification_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-minecraft-java-server_GM479516143.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-money-links-coin-master_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-2021000-robux-for-free-only-one-click_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-can-i-get-free-robux_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/robux-online_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-attack-hack_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-a-free-minecraft-account_GM479516143.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-free-pet-food-in-coin-master_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/minecraft-ps4-free_GM479516143.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-gold-cards_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey-2021_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-vip-servers-for-free-on-roblox_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/roblox-zone-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000305f.bin
e212af0f2e5d91c7732b3825d2aa8c5897964c25a835f1ba14c8a723cb3f7011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x305F 22060 bytes
font_01_sfnt_off00006119.bin
55b50ae8bd634b4b77cb49565a69045864e2c5c8b8a639d3b9d8f7d344d9ee2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6119 19464 bytes

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