Malicious PDF — malware analysis report

Static analysis result for SHA-256 95be66734326120b…

MALICIOUS

PDF

45.1 KB Created: 2021-05-17 04:35:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bcaffedd68d6fca31435fc24ca800cd3 SHA-1: ba31da815072ae26bda8c41d29bcc556596b3da3 SHA-256: 95be66734326120b5d9d30d1e4579b40381aaa5654d56463104eb7e20adc5654
122 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to other PDF files, suggesting a link farm or SEO spam tactic. The ML classifier also flagged this PDF as malicious with high confidence. While the document body mentions 'Can You Play Minecraft For Free', the primary malicious activity appears to be the distribution of links to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/479516143/can-you-play-minecraft-for-free-game-hack
    • http://paro.net.ua/images/robux-codes-generator-no-human-verification_GM431946152.pdf
    • http://paro.net.ua/images/minecraft-bedrock-download-pc-free_GM479516143.pdf
    • http://paro.net.ua/images/claim-robux_GM431946152.pdf
    • http://paro.net.ua/images/easy-robux-com_GM431946152.pdf
    • http://paro.net.ua/images/coin-master-free-spins-promo-code_GM406889139.pdf
    • http://paro.net.ua/images/coin-master-free-spins-coins_GM406889139.pdf
    • http://paro.net.ua/images/100-free-spins-for-coin-master-2021_GM406889139.pdf
    • http://paro.net.ua/images/free-robux-with-no-survey_GM431946152.pdf
    • http://paro.net.ua/images/robuxy-com-free-robux_GM431946152.pdf
    • http://paro.net.ua/images/minecraft-java-hacks_GM479516143.pdf
    • http://paro.net.ua/images/roblox-adopt-me-free-pets_GM431946152.pdf
    • http://paro.net.ua/images/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • http://paro.net.ua/images/rbx-gg-free-robux_GM431946152.pdf
    • http://paro.net.ua/images/free-spins-on-coin-master-without-human-verification_GM406889139.pdf
    • http://paro.net.ua/images/free-premium-roblox_GM431946152.pdf
    • http://paro.net.ua/images/coin-master-free-spins-android_GM406889139.pdf
    • http://paro.net.ua/images/coin-master-gold-cards-free-link_GM406889139.pdf
    • http://paro.net.ua/images/how-to-make-free-robux_GM431946152.pdf
    • http://paro.net.ua/images/roblox-script-hacks_GM431946152.pdf
    • http://paro.net.ua/images/coin-master-links-to-get-free-spins_GM406889139.pdf
    • https://sigmaclient.info#2
    • https://flux.today#3
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a76.bin
5347ad31261d14cc8f3be5de776eced83267664ee83161510a971a4667fffd12
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A76 25232 bytes
font_01_sfnt_off00008368.bin
02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8368 2912 bytes
font_02_sfnt_off00008d65.bin
81bede04d90c080fa29d20db124f1531358f39ee91ce610139dedd08dc3401fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D65 18420 bytes