Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d07daa593afecd…

MALICIOUS

PDF

43.5 KB Created: 2021-05-20 02:25:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a2e5fd446b45c1f6f7d349dc7871964f SHA-1: fc57445b058904472f2b89db93a1728406da4801 SHA-256: e1d07daa593afecde975128b12da26ba8d927c22cd369623f008ca570ca717ac
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links to external websites, many of which are structured as SEO-optimized PDF gateways for game-related cheats and hacks. The ML classifier and the PDF_SEO_LINK_FARM heuristic strongly indicate malicious intent. The document body, though partially corrupted, contains references to 'Pokemon Go Free Promo Codes' and a URL that aligns with the link farm, suggesting a lure for users seeking in-game advantages. The presence of numerous links to PDF files on 'global-brand.net' indicates a potential link farm designed to distribute further malicious content or lead to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/1094591345/pokemon-go-free-promo-codes-2021-game-hack
    • http://global-brand.net/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://global-brand.net/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdf
    • http://global-brand.net/userfiles/files/coin-master-free-spin-link-app_GM406889139.pdf
    • http://global-brand.net/userfiles/files/hack-coin-master-spin_GM406889139.pdf
    • http://global-brand.net/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://global-brand.net/userfiles/files/coin-master-daily-bonus-hack_GM406889139.pdf
    • http://global-brand.net/userfiles/files/hack-robux_GM431946152.pdf
    • http://global-brand.net/userfiles/files/free-robux-codes_GM431946152.pdf
    • http://global-brand.net/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://global-brand.net/userfiles/files/free-magical-chest-coin-master_GM406889139.pdf
    • http://global-brand.net/userfiles/files/how-to-get-free-spins-on-coin-master-game_GM406889139.pdf
    • http://global-brand.net/userfiles/files/coin-master-free-spin-27_GM406889139.pdf
    • http://global-brand.net/userfiles/files/coin-master-free-box_GM406889139.pdf
    • http://global-brand.net/userfiles/files/free-daily-spins-coin-master-2021_GM406889139.pdf
    • http://global-brand.net/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdf
    • http://global-brand.net/userfiles/files/roblox-report-hacker_GM431946152.pdf
    • http://global-brand.net/userfiles/files/free-robux-generator-no-survey_GM431946152.pdf
    • http://global-brand.net/userfiles/files/roblox-help-free-robux_GM431946152.pdf
    • http://global-brand.net/userfiles/files/master-coin-free-spin-daily_GM406889139.pdf
    • http://global-brand.net/userfiles/files/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a0a.bin
2d8b1c531bc021c32b9a9f6b90944e19d7ceff646e57128512251b448991600d
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A0A 26996 bytes
font_01_sfnt_off0000875c.bin
66b98c805e736f36c4141867a1a55c0896f4f78dbbd2220f0a24f39671015e9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x875C 18420 bytes