Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee50e5ede06ae92e…

MALICIOUS

PDF

70.9 KB Created: 2021-09-26 04:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c0df0abbf8b34b5dd827945588b47991 SHA-1: a513e1fbc072cc98094b0903c12b71242d682270 SHA-256: ee50e5ede06ae92e98424a3143f6f0e6673f110c6fc77753c1ed254197ff4d86
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to various domains, many of which appear to be link farms or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and the 'link farm' heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://irlanc.ru/uplcv?utm_term=btinternet+email+settings+android PDF link annotation
    • https://alkathirilaw.com/userfiles/files/guvapevajag.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/loxozemikezaxo.pdfIn PDF document text
    • http://agama-rc.com/upload/files/piparimowiwekomixepefunor.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/83144523346.pdfIn PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/kikivufejuban.pdfIn PDF document text
    • http://southerncross-ex.com/images/blog/file/15081397567.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/tasojunixuwesefinoxadul.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/85798817173.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/vofem.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/94268457000.pdfIn PDF document text
    • https://phr4u.com/files/nalowarikodijalok.pdfIn PDF document text
    • http://strandedtattoo.com/file/wawagejud.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/basad.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/88409341203.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161344c748199c---rokudodudesuwew.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/24567866549.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/kowefojonoteteka.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/26558052815.pdfIn PDF document text
    • https://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/zesisonofikesariwiwomu.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f411432b7---66027330453.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/jesibozige.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/kemogog.pdfIn PDF document text
    • http://dae-young.kr/upload/fckeditor/file/fujugowomakog.pdfIn PDF document text
    • 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_off0000b23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB23E 10644 bytes
SHA-256: d9794b5a275a68a3a9d9e70c1d943f78872a0f66dd9bca97bf7e493b2aa86d90
font_01_sfnt_off0000ca64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 17128 bytes
SHA-256: 64aa469c12dd23e11cdf4a2103de9119b98f6a10d3de3762e4d3905504c1ef7a

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