Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8bad108c0e6ea4d…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 13:03:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b40f6712e78fc1301c6a45d96715ffa3 SHA-1: 61fc2f2c74b8381bbb47d36ea70127fe6345c836 SHA-256: a8bad108c0e6ea4d735ba291e0ab0e3d181e362fa0869892c2055b48649a214e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized PDF files, suggesting a link farm designed to lure users to potentially malicious content. The document body and extracted URLs indicate a theme of offering free games or in-game currency, a common lure for phishing or malware distribution. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/479516143/how-to-get-minecraft-bedrock-edition-on-pc-for-free-game-hack
    • http://parafia-nspj-lebork.pl/images/how-to-win-free-robux_GM431946152.pdf
    • http://parafia-nspj-lebork.pl/images/free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://parafia-nspj-lebork.pl/images/coin-master-34-4-hack-download_GM406889139.pdf
    • http://parafia-nspj-lebork.pl/images/minecraft-for-laptop-free_GM479516143.pdf
    • http://parafia-nspj-lebork.pl/images/hack-xp-net-coin-master_GM406889139.pdf
    • http://parafia-nspj-lebork.pl/images/is-roblox-free-on-nintendo-switch_GM431946152.pdf
    • http://parafia-nspj-lebork.pl/images/coin-master-free-spin-whatsapp-group_GM406889139.pdf
    • http://parafia-nspj-lebork.pl/images/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdf
    • http://parafia-nspj-lebork.pl/images/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • http://parafia-nspj-lebork.pl/images/coin-master-spin-link-today_GM406889139.pdf
    • http://parafia-nspj-lebork.pl/images/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://parafia-nspj-lebork.pl/images/sites-to-get-free-robux_GM431946152.pdf
    • http://parafia-nspj-lebork.pl/images/coin-master-hack-2021-download_GM406889139.pdf
    • http://parafia-nspj-lebork.pl/images/coin-master-on-facebook_GM406889139.pdf
    • http://parafia-nspj-lebork.pl/images/robloxhacks_GM431946152.pdf
    • http://parafia-nspj-lebork.pl/images/free-robux-without-offers_GM431946152.pdf
    • http://parafia-nspj-lebork.pl/images/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdf
    • http://parafia-nspj-lebork.pl/images/how-to-get-free-robux-on-phone_GM431946152.pdf
    • http://parafia-nspj-lebork.pl/images/coin-master-hack-apk-35-13_GM406889139.pdf
    • http://parafia-nspj-lebork.pl/images/coin-master-hack-online-no-human-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049e8.bin
70e433eacdf6cfc8862d83059dd6e313a122e59c6fc567f6b007f60e414a40b2
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E8 25272 bytes
font_01_sfnt_off000082dc.bin
22ac8c3ecfb52a55793ff71594f7fcfb36c91cb725e140eddc746c1d049752ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x82DC 18588 bytes