Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2616a31c80aa416…

MALICIOUS

PDF

34.7 KB Created: 2021-06-20 09:46:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 697b146f2ef3f5b79cd99a1efe2f3e50 SHA-1: a33bf5575d939b4c597a85ce5d3e31be3b6f1bee SHA-256: c2616a31c80aa416d38740500474fa2b5cb413eaff28861250cc4b83cfd01fbf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm heuristic, suggesting it is designed to direct users to external resources. The document body and extracted URLs focus on game hacking and in-game currency, indicating a lure for potentially malicious downloads or scams. The ML classifier also flagged this PDF as malicious with high confidence.

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/does-roblox-track-the-ip-of-the-hacker-game-hack
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-hack-coin-master_GM406889139.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/hacked-version-of-roblox-ios_GM431946152.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/daily-coin-master-free_GM406889139.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-hack-2021-apk-download_GM406889139.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/promo-code-free-robux_GM431946152.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-play-online-free_GM406889139.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/real-coin-master-free-spins_GM406889139.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/master-coin-free-spin-daily_GM406889139.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/como-hackear-roblox-para-tener-robux-pc_GM431946152.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-spin-coin-master-apk_GM406889139.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-hack-coin-master-spin-ios_GM406889139.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/legit-free-spins-coin-master_GM406889139.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/rbx-hut-promo-codes_GM431946152.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-spin-link-for-coin-master-game_GM406889139.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-free-foxy-food_GM406889139.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-hack-ios-no-jailbreak_GM406889139.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-spins-coin-master_GM406889139.pdf
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-get-free-pet-food-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000326e.bin
f46daf5150a67a817be44c7a451e7710bb7d40d81e7e727cb6a2499d847aa8f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x326E 21680 bytes
font_01_sfnt_off00006223.bin
e73e1f1c807bcb0899a0de4f4e61bfcac0e5e22b31150ff2f3cd449d8afb02db
pdf-font-stream PDF embedded font (sfnt) at offset 0x6223 19164 bytes