Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee7cec772b06d91…

MALICIOUS

PDF

46.7 KB Created: 2021-06-11 01:23:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e4e1c8f8665c27303fd3c252377b8570 SHA-1: 398438ff7517689621a1e30fa57e6987ca3ea48c SHA-256: 7ee7cec772b06d916fc79ae3c1daad7ce0617325e12de6dfcd06c5d1e19880c1
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are structured as SEO-optimized PDF links, suggesting a link farm designed to drive traffic. The document body and extracted URLs indicate a lure related to game hacking, such as for Roblox or Coin Master. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.tw/app/431946152/roblox-pc-hack-2021-game-hack
    • http://safari-crimea.com/images/how-to-hack-coin-master-game-ios_GM406889139.pdf
    • http://safari-crimea.com/images/how-do-you-hack-roblox_GM431946152.pdf
    • http://safari-crimea.com/images/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdf
    • http://safari-crimea.com/images/free-robux-without-offers_GM431946152.pdf
    • http://safari-crimea.com/images/how-to-hack-in-arsenal_GM431946152.pdf
    • http://safari-crimea.com/images/websites-that-give-you-free-robux_GM431946152.pdf
    • http://safari-crimea.com/images/coin-master-free-spins-only_GM406889139.pdf
    • http://safari-crimea.com/images/wurst-112-2_GM479516143.pdf
    • http://safari-crimea.com/images/coin-master-hack-2021_GM406889139.pdf
    • http://safari-crimea.com/images/free-spins-on-coin-master_GM406889139.pdf
    • http://safari-crimea.com/images/pubg-uc-redeem-code_GM1330123889.pdf
    • http://safari-crimea.com/images/bloxpage-free-robux_GM431946152.pdf
    • http://safari-crimea.com/images/coin-master-free-spins-link-2021-haktuts_GM406889139.pdf
    • http://safari-crimea.com/images/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://safari-crimea.com/images/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdf
    • http://safari-crimea.com/images/how-to-get-free-permanent-robux_GM431946152.pdf
    • http://safari-crimea.com/images/roblox-hackers-list_GM431946152.pdf
    • http://safari-crimea.com/images/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdf
    • http://safari-crimea.com/images/80-free-spins-coin-master_GM406889139.pdf
    • http://safari-crimea.com/images/roblox-admin-hack-dll-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004d95.bin
39f00d861ef9042ab4772d2e23a12efade3b7db533efd519493bae65c8bfe117
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D95 24788 bytes
font_01_sfnt_off0000871f.bin
4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
pdf-font-stream PDF embedded font (sfnt) at offset 0x871F 3400 bytes
font_02_sfnt_off00009249.bin
5cc01e9b507214113935ad8e715fc92284da06b4f972fba904736862b4a4486d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9249 18740 bytes