Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd9140c74ee264b…

MALICIOUS

PDF

83.1 KB Created: 2021-09-13 21:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 77716be4a4747909bb0dcb15a1218148 SHA-1: 026d08f78ef2f2acf1df4679109cc9f6bab82473 SHA-256: 6fd9140c74ee264b18b1361c6e48137ed61f87993f73fe2749a2de2e12191304
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external domains, many of which are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://coretry.ru/uplcv?utm_term=period+of+inverse+trigonometric+functions PDF link annotation
    • https://kingcarmotorista.net/uploads/files/detanepibitivupala.pdfIn PDF document text
    • http://albertf.madteam.net/ckfinder/userfiles/files/vabasovepikamu.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/26567428930.pdfIn PDF document text
    • http://letdentalab.com/img/files/24665329155.pdfIn PDF document text
    • http://vtaky.sk/media/file/gopur.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613559ebb5422---nipabuk.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/70468124594.pdfIn PDF document text
    • http://rimini-portal.de/bilderarchiv/file/mexakifofetagaxepidabiv.pdfIn PDF document text
    • https://schmitz.cz/res/file/78755749990.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/zafojure.pdfIn PDF document text
    • https://www.vita-organic.eu/admin/ckfinder/userfiles/files/ditumerafususudakofine.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/28519726767.pdfIn PDF document text
    • http://p-jtech.com/userData/board/file/23915907625.pdfIn PDF document text
    • https://suthuytinh.com/app/webroot/uploads/files/pojenem.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/kipeg.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/ziganakipukotaxif.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/finotanuladonodo.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/4806437763.pdfIn PDF document text
    • http://terfigyelokamera.info/files/file/vosunub.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/rizuwokijuraj.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///60284848718.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/66061272273.pdfIn PDF document text
    • http://sobateracota.ro/mm/file/pukexemokexiwuwe.pdfIn PDF document text
    • https://self-storage.sg/images/uploadedimages/file/lesebexebatunebikufo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF3 10776 bytes
SHA-256: 84f4f35d32c4e7cef60dbaddca422249e10240f07dfa07674905885cabcf9b6d
font_01_sfnt_off0000f59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 18708 bytes
SHA-256: 73168d5425728dc5912164a02f03224d2cdc8e94c27f51948089aa07cde05763
font_02_sfnt_off00012635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12635 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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