Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d3bd29526da926…

MALICIOUS

PDF

42.8 KB Created: 2021-05-16 10:56:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 651108dae7fdf28d20634974231df273 SHA-1: d6782b1df037de6bc776eda403a77749aedb1811 SHA-256: b3d3bd29526da9269356af83ee7c64521dba93a81165125f613e870c5865719d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a link farm, with the primary URL being `https://netcdn.xyz/app/406889139/how-to-get-spins-for-free-on-coin-master-game-hack`. The document body and heuristics suggest a lure related to 'Coin Master' game cheats, aiming to redirect users to these spammy links. While no scripts were explicitly extracted, the PDF structure and extensive link farm indicate a malicious intent to drive traffic or potentially deliver further payloads.

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/how-to-get-spins-for-free-on-coin-master-game-hack
    • http://brusivojimi.com/images/coin-master-free-spins-blogspot_GM406889139.pdf
    • http://brusivojimi.com/images/free-robux-generator_GM431946152.pdf
    • http://brusivojimi.com/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdf
    • http://brusivojimi.com/images/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://brusivojimi.com/images/2021-free-coin-master-spins_GM406889139.pdf
    • http://brusivojimi.com/images/free-robux-generator-2021-no-survey_GM431946152.pdf
    • http://brusivojimi.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://brusivojimi.com/images/coin-master-hack-apk-33-download_GM406889139.pdf
    • http://brusivojimi.com/images/coin-master-spin-hack-no-verification_GM406889139.pdf
    • http://brusivojimi.com/images/minecraft-free-download-no-virus_GM479516143.pdf
    • http://brusivojimi.com/images/minecraft-pe-hack-client_GM479516143.pdf
    • http://brusivojimi.com/images/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • http://brusivojimi.com/images/roblox-free-body_GM431946152.pdf
    • http://brusivojimi.com/images/coin-master-2021-free-spins-link_GM406889139.pdf
    • http://brusivojimi.com/images/coin-master-hack-no-verify_GM406889139.pdf
    • http://brusivojimi.com/images/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://brusivojimi.com/images/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdf
    • http://brusivojimi.com/images/free-spin-coin-master-new-link_GM406889139.pdf
    • http://brusivojimi.com/images/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • http://brusivojimi.com/images/free-robux-games_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ec.bin
bc57e78fa90d40d0daca021dfc390426dfb50b6289b91cfd6918bf82108ade3a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49EC 26080 bytes
font_01_sfnt_off0000859c.bin
47440d657d3113c77609ac1f1fa23dbad16ef39c626e59ad062e9d3e25c5a4b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x859C 18052 bytes

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