Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec0609dc38f896c…

MALICIOUS

PDF

75.1 KB Created: 2021-09-19 15:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ddf127dfed2cc834b6446397323733bc SHA-1: 17e6453629dfcae776ef571df8e1d588597c62ba SHA-256: 2ec0609dc38f896cc832a770cd186a57205b213de6be04ed61d04b3459fb084e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document, likely intended to lead users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://heatexchangersolution.com/upload_fck/file/2021-9-2/20210902040737488531.pdf In PDF document text
    • http://sous-mama.org/userfiles/file/tisidevojiv.pdfIn PDF document text
    • https://halkapsikoloji.com/userfiles/file/kifako.pdfIn PDF document text
    • http://dichvumucin.com/upload/ckupload/files/98425490818.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/89030238171.pdfIn PDF document text
    • http://les-dvorik.ru/userfiles/file/72781461971.pdfIn PDF document text
    • https://proia.bg/userfiles/file/38292794821.pdfIn PDF document text
    • https://tepatsasaran.com/contents/files/10628573879.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/vivirim.pdfIn PDF document text
    • http://myphamnanyno.com/luutru/files/nezopifapepivezo.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/rabufevaran.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161435b306e928---82930821094.pdfIn PDF document text
    • https://mattress-leader.com/media/pijelurunizatulezojutu.pdfIn PDF document text
    • http://bociany.sk/media/file/senurekalukolezalutogaw.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/16982128844.pdfIn PDF document text
    • http://ydchem.cn/filespath/files/20210905001616.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/natob.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/145a6ffed8186e77dfe0ebcb078cedab/44148413197.pdfIn PDF document text
    • https://electroagro.es/pub/files/vedoxew.pdfIn PDF document text
    • https://ismart99.net/upload/files/guwomoxutasu.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/32791397871.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210918043542128.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/3178084519.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/zuvimudoduwumef.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/gokavifijuvorizubad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=fast+and+furious+8+full+movie+gomoviesPDF 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_off0000be07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61E 11048 bytes
SHA-256: a63cdd89130a1e7d5ff72c993dc61e51658570f843acf574267709dc9c245fed
font_02_sfnt_off0000ef9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9E 18104 bytes
SHA-256: 59ef6edfb8bd954a16e3143fc5acedd64344a54ca3080ae13853d03c853fbedf

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