Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e9d85fe5bd6bfe…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 11:41:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 821ac8243bf2d879e55e33177c9ef4f0 SHA-1: 7272475308d1d06d24a4860cb7c4d10bbf85fd79 SHA-256: f1e9d85fe5bd6bfe53d9b0c54662b47996b1ff2f59ccd343af3bc1f6ebe1ba16
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are SEO-optimized and point to websites offering game cheats and hacks for popular games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to redirect users to potentially harmful sites. The presence of a 'download button' lure further supports this, aiming to trick users into clicking through to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-daily-free-spins-link-today-game-hack PDF link annotation
    • http://perpus.unik-kediri.ac.id/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-hack-for-rocitizens_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/speed-hacks-on-fangs-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox36com-free-robux_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_002_off000031ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31CE 23564 bytes
SHA-256: 9283ce323a511fbc1185a74f0a21a7389cdc36782c82886a8f08e2c911a13714
font_01_sfnt_off0000672c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672C 18940 bytes
SHA-256: 5cc00af5396ac6d0bbe2617822e874747972297797067d6a5c9a01e6a5c32b4c

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