Malicious PDF — malware analysis report

Static analysis result for SHA-256 048ef713f971b8d5…

MALICIOUS

PDF

43.0 KB Created: 2021-05-12 00:41:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9b91203d8bcc2176779caaa5c64de3be SHA-1: 3cc4dfcc160e0b3ff3ceb3e2f9fdfd5abbd09ddc SHA-256: 048ef713f971b8d5279d281e87de5594e6a7cdc832a88c3c0a87406b0a54a529
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 and point to sites offering free in-game currency or items. The document body and embedded links suggest a lure for users seeking such items, likely leading to phishing or scam websites. The ML classifier also flagged this PDF as malicious with high confidence.

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/406889139/get-free-spins-on-coin-master-2021-game-hack
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/coin-master-free-cards-and-spin-link_GM406889139.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/coin-master-links-for-today_GM406889139.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/play-minecraft-for-free-on-pc_GM479516143.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/robux-free-gift-card_GM431946152.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/coin-master-unlimited-free-spins_GM406889139.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-coins-and-spins-coin-master_GM406889139.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/robux-generator_GM431946152.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/minecraft-java-edition-for-free_GM479516143.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/rbx-place-free-robux_GM431946152.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-coins-coin-master-blog_GM406889139.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/coin-master-free-spins-link-quora_GM406889139.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/minecraft-cheats-switch_GM479516143.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/best-minecraft-hacked-client_GM479516143.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/freespinandcoin_GM406889139.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/get-free-robux-com_GM431946152.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/levvvel-coin-master_GM406889139.pdf
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-games-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ae5.bin
644b61a45d6d2ae58d273981c5e846f3794d53053794a27b55d7a167fd3dc1bc
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE5 26092 bytes
font_01_sfnt_off000085cc.bin
51edae499e96af11139ef94313efcbf906f73cd888d739ca20624da83f1b55af
pdf-font-stream PDF embedded font (sfnt) at offset 0x85CC 18288 bytes