Malicious PDF — malware analysis report

Static analysis result for SHA-256 eded4378437a88bd…

MALICIOUS

PDF

45.4 KB Created: 2021-05-14 17:02:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a79091311bf53cc161590cb24a53857f SHA-1: 6a283621ecb3037485daa366b162a73f419676d1 SHA-256: eded4378437a88bd1a65d6be3bde3c8f25fe55cafd568c3a6b36d27bf4d6524f
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as PDF files themselves, suggesting a link farm designed to distribute malware or facilitate phishing. The document body and heuristics indicate a lure for free game hacks, a common social engineering tactic. The presence of a 'Password-protected archive handoff' heuristic suggests that the linked content may be an archive requiring a password, a technique used to bypass security scanners.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/479516143/minecraft-switch-free-game-hack PDF link annotation
    • http://ecotherm-01.eu/images/roblox-free-hats_GM431946152.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/toolbox-for-minecraft-pe-ios_GM479516143.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/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://ecotherm-01.eu/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/hacks-for-minecraft-windows-10_GM479516143.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/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.youtIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d32.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D32 25316 bytes
SHA-256: 96e186e90ef0de3cd37265cc62e261e278ee42b39485ed16c9ea08f392570b66
font_01_sfnt_off0000863c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x863C 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off0000904c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x904C 17896 bytes
SHA-256: 007033aff5279ca1734c8b5acd2e97475fe5046f63b80ac47a6a8ac54a1add4f

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