Malicious PDF — malware analysis report

Static analysis result for SHA-256 813046f927752e6a…

MALICIOUS

PDF

41.7 KB Created: 2021-05-18 03:51:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: aea5d633b0ec505332f6af4c6d6eeeeb SHA-1: 750c61aebb6b09cfa1f51102d476787d68118ab7 SHA-256: 813046f927752e6aa90bd1b159b45a705e65ecb57fc81d86d1f9e2b546770908
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to sites offering cheats or free currency for games like Coin Master and Robux. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URIs and a call-to-action phrase further supports a malicious intent. The document likely serves as a lure to drive traffic to potentially malicious or scam-related websites.

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/406889139/coin-master-free-spins-glitch-game-hack
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-apple_GM406889139.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/how-to-give-robux-on-mobile_GM431946152.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/minecraft-free-download-android-apk_GM479516143.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-without-human-verification_GM406889139.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-2021_GM431946152.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/can-u-get-free-robux_GM431946152.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/free-robux-rewards_GM431946152.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/ways-to-earn-robux_GM431946152.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/how-to-hack-any-roblox-account_GM431946152.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/coin-master-hacks-that-actually-work_GM406889139.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/coin-master-spin-free_GM406889139.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/roblox-hack-ios_GM431946152.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/wahoogaming-co-free-robux_GM431946152.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-free-download_GM406889139.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/coin-master-free-spins-today-new_GM406889139.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/best-minecraft-hacks_GM479516143.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/haktuts-coin-master_GM406889139.pdf
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/coin-master-free-100-spin-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c5.bin
d9e6ba41fe5a0f09adec471d485f921c943e91529addc85e198e486383a390d6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C5 24368 bytes
font_01_sfnt_off0000814a.bin
be2b3679075e4e1310ff978ad8c26e1b718646752b81212a75ede70c65753871		 pdf-font-stream PDF embedded font (sfnt) at offset 0x814A 18124 bytes

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