Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d82f76354b29f4…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 09:07:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 292857e77c06aa72362b3a3e25394a4e SHA-1: b1603609670c4fa80d109a4921c55604ef5d50f6 SHA-256: e9d82f76354b29f47c97b70dee40768e142fcab04015c28fb5568529d19c2429
142 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which are part of a link farm designed to appear as SEO content. The document body, though heavily obfuscated, contains text related to "Coin Master Hack Tool" and a URL pointing to a download. The presence of a "download button" lure and instructions for a password-protected archive further indicate a malicious intent to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.online/app/406889139/coin-master-hack-tool-v1-9-download-free-game-hack PDF link annotation
    • http://katalog.gemalibrary.net/repository/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/pokemon-go-free-shiny-celebi_GM1094591345.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005375.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5375 26244 bytes
SHA-256: 7a8256ce709ca2bf6514ca0802402af9adb388133fb77d69ebab27475cf5aa81
font_01_sfnt_off00008d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D90 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off0000977a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x977A 18864 bytes
SHA-256: f6546c931e30ebe5b0f44735796ae8f725f630439fc19eae70f9e7cc234a2321

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