Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7130255072d3ac5…

MALICIOUS

PDF

35.9 KB Created: 2021-06-20 05:10:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ae55457f597decb50e3ea96efb975f54 SHA-1: e147b7514cf31e66e59f8c9e11df9729735b2944 SHA-256: a7130255072d3ac5c0ad9aa3df5b9f4d115954f1c16c2065b18ff9954f7c4a67
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that promotes hacking and cheating in popular games like Roblox and Coin Master. The presence of a "PDF_SEO_LINK_FARM" heuristic indicates a large number of external links, likely intended to direct users to malicious or deceptive content. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or scam attempt.

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/como-hackear-una-cuenta-de-roblox-2021-game-hack
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-coin-master-androd-cheats-2021_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-change-username-on-roblox-for-free_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-hack_GM479516143.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/blogspot-coin-master-free-spins_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-change-roblox-name-for-free_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-a-free-minecraft-server_GM479516143.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/orewards-com-free-robux_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-attack-hack_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/strucid-aimbot_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-roblox-premium-for-free_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/minecraft-free-unblocked_GM479516143.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/hack-coin-master-without-verification_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/best-hack-script-pack-for-roblox_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-free-snacks-on-coin-master_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/roblox-help-free-robux_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/hacks-roblox-scripts_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-2021-spin-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003169.bin
89ad624a7d3f456518d2085c5e6b526c780965007f49e8f1c6b5f1506bba81bc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3169 22920 bytes
font_01_sfnt_off00006524.bin
b76a1e54f18f8cdb26fc7edf6955aa2d94df7536b920f7da8cec9c60e447ccf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6524 19728 bytes

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