Malicious PDF — malware analysis report

Static analysis result for SHA-256 785728bc25de2313…

MALICIOUS

PDF

41.5 KB Created: 2021-05-16 01:03:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6c188826889109d9daf35b7b3f6a816b SHA-1: e7d5c78368efc5dc582707685c03788a25dc0cd7 SHA-256: 785728bc25de231336736b55e55794e6b778729d75274bc81861aca4a429baf4
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which are related to game hacks and free items, suggesting a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports this. The document body, though partially corrupted, contains a primary URL pointing to a 'roblox-free-skin-game-hack'.

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/431946152/roblox-free-skin-game-hack
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-do-you-get-minecraft-for-free_GM479516143.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/what-are-points-for-in-roblox_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/minecraft-java-free-trial_GM479516143.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/play-coin-master_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/how-do-you-hack-roblox_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/how-to-hack-coin-master_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/robux-match_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/coin-master-hack-spins-game-download_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-minecraft-packs_GM479516143.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/but-link-says-free-robux_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/coin-master-hack-apk-2021-download_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-daily-spins-coin-master-2021_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/coin-master-free-spins-2021-generator_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/coin-master-free-blogspot_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/pro-free-spins-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004946.bin
db693bf9f9e7927b84f76a1656e51ec3a0a0ea55cbaa3be8fb76371470ee1866		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4946 24188 bytes
font_01_sfnt_off00008012.bin
fe5c379a651f4809ca818f9833677e51b0108f9913a81e91a720280e66b9d385		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8012 18236 bytes

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