Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda21795cd3b8789…

MALICIOUS

PDF

42.7 KB Created: 2021-05-12 05:04:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 627f0a220f3a29c7085e9d0cb0b629a8 SHA-1: 878c01aa051bb7af153e701dcdf8ee1d173f5022 SHA-256: fda21795cd3b878939ba51d0e8edf83d7edcd058c8d9f1c1605461d59d62f633
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external sites, many of which are SEO-optimized PDF gateways for topics like "free robux" and "hack clients". The document body also contains a direct URL to a "minecraft-hack-client". The presence of a "Clipboard command execution lure" heuristic indicates the document likely instructs the user to copy and paste commands into a shell, a common technique to download and execute further payloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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-hack-client-1.8-9-game-hack PDF link annotation
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/get-robux_GM431946152.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C44 24856 bytes
SHA-256: 2ef14b81612a0b5c7fef8601bc3f2eaf713abb6253435ba5b1bfc82dec0edab4
font_01_sfnt_off00008456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8456 18356 bytes
SHA-256: 7146a4451d5a4af0805248e1a25bf748bd62d3cefbd8f089093f6989f2885b31

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