Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa092ee02dd33484…

MALICIOUS

PDF

41.1 KB Created: 2021-05-14 09:08:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 01d5dcab6525679b16bd4bd1b997f562 SHA-1: e0ae862eabd338c7bdf5011c9b3626e418cbf3fc SHA-256: fa092ee02dd334845adaffcbad675fa7dd8fb650d4cb666f325a6b06709da170
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a PDF link farm. The document body and extracted URLs suggest a lure related to 'Coin Master' game hacks and free spins, likely intended to drive traffic to SEO spam pages or facilitate the download of further malicious content. The ML classifier also strongly indicated maliciousness.

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/pro-free-spins-coin-master-game-hack PDF link annotation
    • http://hindicenter.com/images/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://hindicenter.com/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/coin-master-free-spins--spins_GM406889139.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_003_off00004804.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4804 24412 bytes
SHA-256: 654301d6906f4727f890b0c6897db326cdccbf5894b616710bc76b75f1c0e22c
font_01_sfnt_off00007edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDB 18040 bytes
SHA-256: f9cfd09f1f0adcfb05f49f46170915efea321752292d644bf66086fa9d05ce61

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