Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f261065b0a4abf1…

MALICIOUS

PDF

34.0 KB Created: 2021-06-29 19:45:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a2d8c67dddeddec20d979ff7387418f6 SHA-1: 6090b2f4e3e52c42fd1a5b2bccf406676ee7e2a7 SHA-256: 7f261065b0a4abf159dd92e512d8848a98e2c960264ba57c6186c0f946f48776
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a prominent call-to-action related to obtaining free in-game currency or items for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or phishing attempt. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to click these links, which likely lead to scam websites or download sites for malicious software.

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/get-free-builders-club-on-roblox-2021-game-hack
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/mangocheats-com-hack-coin-master-cheat_GM406889139.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/how-to-get-free-roblox-gift-cards_GM431946152.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-robux-2021-no-waiting_GM431946152.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-tiktok-fans-no-verification_GM835599320.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/minecraft-gun-mod-download-free_GM479516143.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/robux-app_GM431946152.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/daily-free-spin-coin-master-link_GM406889139.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/coin-master-free-coin-and-spin-app_GM406889139.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-robux-working_GM431946152.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/how-do-you-install-minecraft-for-free_GM479516143.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/rbx-land-free-robux_GM431946152.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/minecraft-pocket-edition-free-apk_GM479516143.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/coin-master-free-spin-and-trading-group_GM406889139.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/roblox-robux-hack-zone_GM431946152.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-robux-reddit_GM431946152.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/como-hackear-coin-master-ios_GM406889139.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-robux-app_GM431946152.pdf
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dd0.bin
b7fdf75e6621194c449bb6dbdf58b5aa809743e00bd652b256a783d873b4c236		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD0 22020 bytes
font_01_sfnt_off00005e43.bin
027c927c7e292f02bd8f24dc77912472b597ab890ffd6d54f8b072f1df32826b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E43 19588 bytes

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