Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb68e223dad0c79…

MALICIOUS

PDF

44.5 KB Created: 2021-05-14 23:35:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0de531112c14698a55059112e55d4498 SHA-1: 0a3bfd44c664098698cad930fe96f84d9e6e9281 SHA-256: ffb68e223dad0c796a4e78f31c0836c7aa5c4f33462adbbc0c964c95b96a66d2
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically targeting users interested in hacking Roblox accounts. The ML classifier also strongly indicated maliciousness. The document body and embedded URLs suggest a social engineering lure to drive users to potentially malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/how-to-hack-into-someone In PDF document text
    • http://ecotherm-01.eu/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://ecotherm-01.eu/images/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://ecotherm-01.eu/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/make-free-robux_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/get-free-spins-from-coin-master_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_off00004a19.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A19 27812 bytes
SHA-256: 8f95ce59b76e7d97c1ad9fa1167be90a0cbaf6e89acc14d5b89a9a00f29d576a
font_01_sfnt_off00008986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8986 18912 bytes
SHA-256: bf4ecd0153dd3a330a8d8544a3db10b129edd23679e66a7dba01ca4f284b0ccb

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