Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd25bd927ef08890…

MALICIOUS

PDF

34.5 KB Created: 2021-07-07 09:35:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e96f051c87f10249d5a878dcae123aab SHA-1: acf7c4491f7edd1656f5a053d79c192db687be53 SHA-256: dd25bd927ef088908fc154d022dbd2ca127c73cc8fb4d11321c723efe56643a7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external resources, many of which are presented as "hacks" or "free items" for popular games. The primary URL http://netcdn.tw/app/406889139/coin-master-hack-apk-online-game-hack suggests the distribution of potentially unwanted or malicious applications. The PDF_SEO_LINK_FARM heuristic indicates a large number of generated links, likely for SEO manipulation or to distribute various lures.

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.tw/app/406889139/coin-master-hack-apk-online-game-hack
    • https://bwsrubber.com/image/data/files/coin-master-coin-link_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/roblox-gift-card-codes-free-codes_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/daily-free-spins-coin-master_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/free-spin-coin-master-2021-link_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/how-to-get-more-robux_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/free-robux-generator-without-verify_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/como-hackear-coin-master-2021_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/20210-free-spin-links-for-coin-master_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/how-to-report-a-hacker-that-hacking-you-roblox-account_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/coin-master-free-spin-link-app_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/free-robux-easy-and-fast_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/minecraft-life-hacks_GM479516143.pdf
    • https://bwsrubber.com/image/data/files/oprewards-free-robux_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/roblox-ro-hacks_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/strucid-battle-royale-roblox-hack_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/roblox-com-games-referrer-roblox-player_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdf
    • https://bwsrubber.com/image/data/files/coin-master-hack-download_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/free-robux-no-apps_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000310d.bin
28e8b04f5a7751df523027c681acabb66b4658225b9ce97f63fdffcded787952
pdf-font-stream PDF embedded font (sfnt) at offset 0x310D 22828 bytes
font_01_sfnt_off0000641a.bin
7c30a4e131e9e764ff8405716e7b29be65249b2c73aea01c93c83c8586e936fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x641A 18252 bytes