Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fa5a8f821e1b4f…

MALICIOUS

PDF

42.8 KB Created: 2021-05-15 07:39:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6bfbea96388ba5d1e984dc9264ee8866 SHA-1: 17332d9913601c47f90eb18bb4bfd25e2d10f650 SHA-256: 97fa5a8f821e1b4f0a36521a259de6dba541368b143b7920de2e1f8a7389bb15
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 disguised as legitimate files. The document body and extracted URLs suggest a lure for free in-game currency or virtual items, a common tactic for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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/how-to-get-free-coins-in-coin-master-game-game-hack
    • https://sunnygarden.com.tw/image/data/files/113-hacked-client_GM479516143.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/get-free-robux-2021_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/free-roblox-adopt-me-pets_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-hack-review_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/roblox-com-free-robux_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-mod_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/juego-hackeado-de-coin-master_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-hack-without-verify_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spins-2021-blogspot_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/how-do-you-get-roebucks-for-free_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/legit-coin-master-hack-no-human-verification_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-latest-version-hack_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-hack-no-download_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/free-spin-link-coin-master_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/free-robux-pin-codes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d2f.bin
705ba927ba1d698536d064c6b1f4829e8e9433680d56453729a02122d4fccf4a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D2F 24808 bytes
font_01_sfnt_off00008572.bin
c27ce28ced2cd6ab43782601ea0ea90fe7d4241e5cbb0f725251c39d19020edf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8572 18136 bytes