Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bdf85782e1d47a…

MALICIOUS

PDF

43.0 KB Created: 2021-05-15 07:50:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 72233f0d3749266d363d0c87446d65bc SHA-1: db1d3d28d29402d8d64e2cce68b430bbfd80510d SHA-256: 08bdf85782e1d47aba55430c4763bf63e835abf29e9bc58942d8468db9c7b473
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, many of which are disguised as download opportunities for popular games or in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of such links, and the ML classifier strongly suggests malicious intent. The document body, though partially corrupted, contains URLs that likely lead to phishing or malware distribution sites.

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/479516143/minecraft-noob-vs-pro-vs-hacker-game-hack
    • https://encounternepal.com/userfiles/files/coin-master-free-spin-realme-products_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdf
    • https://encounternepal.com/userfiles/files/coin-master-hack-version_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/coin-master-34-4-hack-download_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/how-do-you-get-free-roebucks_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/rewards-robux_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/links-for-free-spins-for-coin-master_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/free-robux-websites-2021_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/coin-master-hack-blog_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • https://encounternepal.com/userfiles/files/free-game-pack-coin-master_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/no-human-verification-hack-for-coin-master_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/free-robux-human-verification_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/coin-master-hack-com_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdf
    • https://sigmaclient.info#2
    • https://flux.today#3
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aa4.bin
cd0f98a2f769baf98ef7d9cd9701f744c753a742552c22e476780a900be27a04
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA4 25956 bytes
font_01_sfnt_off000085bb.bin
a3a1f77715833b119a7491346a779344ae6dab601cd7000bc388e6bf0c64b7ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x85BB 18328 bytes