Malicious PDF — malware analysis report

Static analysis result for SHA-256 9640ca6b332f5d78…

MALICIOUS

PDF

46.5 KB Created: 2021-05-14 15:11:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fb2e640cdebccd15078760cdca1ea690 SHA-1: 046e51574aea12b34ac5b5ff8a2ef0e896566fa0 SHA-256: 9640ca6b332f5d7820c20cfc4f41ab235d15dada0e9cccade425cdcd68ddcd85
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified by the PDF_URI and EMBEDDED_URL heuristics, pointing to websites offering game cheats and hacks. The PDF_SEO_LINK_FARM heuristic indicates a large number of these links, suggesting a link farm designed to attract users searching for such content. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the document, likely leading users to phishing or scam sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/coin-master-unlimited-free-spins-link-2021-game-hack PDF link annotation
    • https://ceranique.nl/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://ceranique.nl/images/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • https://ceranique.nl/images/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://ceranique.nl/images/spin-and-coin_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/free-roblox-followers_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-hack-tool-download_GM406889139.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_003_off0000494d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494D 27056 bytes
SHA-256: f5537aebf1fce5aea3c67c75c7dbdc6980640539715c2c8bc8e5ff3d1aa59942
font_01_sfnt_off000086ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86AB 2884 bytes
SHA-256: f9d1f73c99ac19e1fa9dba4eb5e90eabc47451d72c930a2b8abf3a4aec2ebdc9
font_02_sfnt_off0000908d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x908D 19152 bytes
SHA-256: 5881489854435c4df30fbeeaf3dcf370e1cc518be434610ef19958204180da95

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