Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c36eee4eeff7f0…

MALICIOUS

PDF

34.9 KB Created: 2021-07-10 00:11:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9e352162d8b05397b74110a077206c0d SHA-1: 12b8ee017b86540d19adb77a167dbbbb56c0039e SHA-256: 93c36eee4eeff7f00c4be0a5bbab07fd8fbd1a6d3799c65a9389fc5c46c80ba8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a call-to-action phrase, strongly suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious. The document body and extracted URLs indicate a lure related to free in-game items for games like Coin Master and Roblox, likely directing users to malicious websites.

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/free-pet-food-on-coin-master-game-hack PDF link annotation
    • http://www.ma-plast.hr/files/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/robuxfree-con_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/5-easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-prize-giveaway-roblox_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-get-free-robux-2021-inspect_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-hack-the-robux_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-hack-roblox-for-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-get-free-cars-in-vehicle-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/size-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-robux-no-download-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/como-hackear-una-cuenta-de-roblox-a-alguien_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-hack-2021-jailbreak_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
font_00_sfnt_off000031a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A3 23040 bytes
SHA-256: 7d9685a64121e92c426d7df1c13a76997db5277e1c53b3807d19e1e85b425b7e
font_01_sfnt_off00006595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6595 18324 bytes
SHA-256: fb998ec370fa4b3e66808c402bc8dd76aab549c6c885f481dee46b46c8328737

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