Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6dd1054a512f9a6…

MALICIOUS

PDF

75.0 KB Created: 2021-09-18 19:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7c2103c77dda74abbd24080751b6317f SHA-1: 50f2f3eb5ff19bfc01a240b2734fb49f87595398 SHA-256: e6dd1054a512f9a69a8344a550a5c857bc70b558e55f7b9803b902b33ed6dce4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm, hosting numerous URLs that likely lead to further malicious content or phishing attempts. The presence of external URIs and the 'link farm' heuristic strongly suggest a phishing or redirection attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://synerhu.ru/uplcv?utm_term=best+app+to+cast+from+phone+to+tv PDF link annotation
    • http://kondicionery-elektrostal.ru/upload_picture/file/devurok.pdfIn PDF document text
    • http://telektrans.hu/editor_up/kebotal.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/12986181570.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/13de8aa708fe6f37855f43b5753e0d48/21357005535.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/74605238856.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/zafuvalowap.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/tazatarilekokowiwizumo.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/5799744095.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/30767672166.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/kifowil.pdfIn PDF document text
    • http://irinabailey.com/upload/files/14517084016.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/zoxelagisedar.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/77475965709.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210908010849.pdfIn PDF document text
    • http://scandinavia-ex.com/images/blog/file/76529398473.pdfIn PDF document text
    • https://possamaiferramenta.it/uploads/file/wibijofatazupuwimitar.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/61600038907.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/minezesatejuvekan.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/84292147650.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/tiviroli.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/5829710977.pdfIn PDF document text
    • http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/vuxonomojeb.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/28333006120.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/44672135124.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/95919377990.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/d95c9cf53b3d0e0ad70c4be3413c5929/meruzotelirewibiruxi.pdfIn PDF document text
    • http://topbuild.net/content/xuploadimages/file/2347356703.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_off0000c3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCF 16308 bytes
SHA-256: a63191d32e4c626ab4a1d68451d47253c137e654cb4d4d5bf577f5750693c37f
font_02_sfnt_off000105b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B5 10728 bytes
SHA-256: 596f4abc1b366a2b55ab7f96a1b33249008b26e077e77bb7dee2b0f49c8fcb9c