Malicious PDF — malware analysis report

Static analysis result for SHA-256 290d3aaa44ef8252…

MALICIOUS

PDF

42.8 KB Created: 2021-05-14 10:38:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 86a889f515a8ef9a0d19b895a80375e5 SHA-1: a35c621dbdf8febabcdd489f55ec5d9eb2f01102 SHA-256: 290d3aaa44ef82522bf77145f0c7849bc551d7d626287577b304aafc474106b8
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious, exhibiting characteristics of a link farm designed to redirect users to potentially harmful content. The document body and extracted URLs promote a lure for free Robux, a virtual currency, suggesting a phishing or scam attempt. The presence of numerous external links, including one to `netcdn.xyz`, indicates an effort to distribute malware or lead users to malicious websites. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests that the user might be prompted to enter a password for an archive, a common tactic to bypass security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/make-free-robux-game-hack
    • https://pa-pangkalpinang.go.id/images/minecraft-coins-free_GM479516143.pdf
    • https://pa-pangkalpinang.go.id/images/free-robux-generator-for-kids_GM431946152.pdf
    • https://pa-pangkalpinang.go.id/images/roblox-studio-free_GM431946152.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-hacks-for-iphone_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-free-spins-link-2021-blogger_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/will-minecraft-dungeons-be-free_GM479516143.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-free-coins-facebook_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/free-minecraft-resource-packs_GM479516143.pdf
    • https://pa-pangkalpinang.go.id/images/free-robux-hack-no-human-verification_GM431946152.pdf
    • https://pa-pangkalpinang.go.id/images/how-to-get-free-robux-app_GM431946152.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-free-coins-2021_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/free-spins-and-coins-blogspot-coin-master_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/minecraft-bedrock-edition-download-pc-free_GM479516143.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-mod-version-free-download-ios_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-get-free-cards_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/roblox-promo-codes-generator-no-human-verification_GM431946152.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-cards-hack-2021_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/lazyblocks-com-free-robux_GM431946152.pdf
    • https://pa-pangkalpinang.go.id/images/free-spins-coin-master-site-wwwquoracom_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-free-rare-cards_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000488c.bin
4bd0ef94f5fb3093ca74401ea54bc0fda5aade64fcaef27fb3fc49cc134db870		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x488C 25728 bytes
font_01_sfnt_off0000840b.bin
ffc801fe6c311414aab45f29f725ac19f85306497fb99419c1a1229f9950fbca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x840B 18608 bytes

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