Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c6aad8753ebf804…

MALICIOUS

PDF

45.2 KB Created: 2021-06-08 23:13:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b47238b5e913f11298d8ab06fbf120da SHA-1: 751331b5a27734452db35e1169c337ec6872a676 SHA-256: 5c6aad8753ebf804d7ce8a8512714eb01d847341c899c512532b8cda64e10c15
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, presented as a "link farm," which is a common tactic for SEO manipulation and distributing malicious content. The document body suggests a lure related to "hacking games," and the presence of a "password-protected archive handoff" heuristic indicates a potential attempt to conceal a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/como-hackear-roblox-movil-game-hack
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/earn-free-spins-for-coin-master_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/free-robux-with-no-verification_GM431946152.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/password-free-roblox-accounts_GM431946152.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/roblox-free-robux-hack_GM431946152.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-hack_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/free-robux-com_GM431946152.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-instantly_GM431946152.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/how-to-exploit-roblox_GM431946152.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/mine-minecraft-games-for-free_GM479516143.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/free-minecraft-account-and-password-generator_GM479516143.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/hack-coin-master-apk-ios_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/free-robux-without-verification_GM431946152.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/daily-free-spin-and-coin_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/get-free-robux-2021_GM431946152.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-cards-free-cards_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-free-spins-without-verification_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/minecraft-server-free-trial_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005353.bin
19395cd5fe232517323ecbe017fc15d2897df5db73d13dd82d74f18ce6c87463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5353 24720 bytes
font_01_sfnt_off00008c91.bin
f068e286c0f07b8fb384a58813440912ac1658ca63be8b4a5ed67385a357322f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C91 18872 bytes

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