Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e66f24beb7de64d…

MALICIOUS

PDF

74.6 KB Created: 2021-09-10 11:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 074c9e1e6a5587d62b78493f0e175334 SHA-1: ad6c7199883db48f2af035a680a17cd048e99f61 SHA-256: 6e66f24beb7de64d1077e8a3a51f7d8a3f31ddbba0c7777b89c01cc15a5a1bfa
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.abcklima.hu/data/editorfile/86814066441.pdf In PDF document text
    • http://sumosushingrill.com/uploads/files/35430272065.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/76865150191.pdfIn PDF document text
    • https://helices-evra.com/userfiles/file/niwedubexujubozuvederaz.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/zerivele.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/lobajolimesedasewarasuren.pdfIn PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/54720998790.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/14522285268.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/33459278485.pdfIn PDF document text
    • http://marymo.ru/uploads/files/dalugemup.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/96092415760.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/vixana.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/60853609810.pdfIn PDF document text
    • http://szpk.hu/_user/file/46962204041.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/10771759027.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/gimevuxeka.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/64711557639.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/161340673730a9---97555033617.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/davovil.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/9eb1ce0984accde864b15f0d86f1a723/rexijaninofewizisavakoz.pdfIn PDF document text
    • http://amdind.com/userfiles/file/kuvepovemakawegefafiva.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/povunopilakifoguku.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/90368502923.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=peter+tompkins+secrets+of+the+great+pyramid+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD92 11228 bytes
SHA-256: 6eeda46d38d6c3f1668c21b2fe29c0482cbfcd6cf9e4ccaf4dfe42faef00f5c4
font_01_sfnt_off0000d791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD791 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA3 17452 bytes
SHA-256: c5e028486e137004f84652e06046a256277359b0a9b9af6ed2a74a5502608bbd

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