Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6d314a283018ad…

MALICIOUS

PDF

84.4 KB Created: 2021-09-18 22:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d1b8f5efb599a84df47628daffaafbaa SHA-1: 28bf07bb85301b0dfe919028815e11b75a88cd3a SHA-256: 4e6d314a283018ad77b1478bb35b48838f2a1e51fd653b9c1799fa649526e215
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=enfermedad+de+mcardle+pdf PDF link annotation
    • http://studioiulianella.it/userfiles/files/79312192362.pdfIn PDF document text
    • http://stillincontact.com/images/mails/file/46527850113.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210916192835.pdfIn PDF document text
    • http://trinitysportsandleisure.ie/userfiles/file/83548425199.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/notisugubekiweli.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/628dfc6fab80b3f6159e28a7dfb9e3d8/rubamebejadutevekatul.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/7106289189.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/gamibapuzapasalofevupid.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/23658395341.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/wogipofudadixo.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/55376311510.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/poxolubuvog.pdfIn PDF document text
    • http://halanmilk.com/upload/files/zikarekotiritij.pdfIn PDF document text
    • http://kes.org/upload/editor/files/92392989087.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202109080935203990.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/66824657666.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/vopudesitamunex.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/galogutulazaza.pdfIn PDF document text
    • http://englishkan.net/UserFiles/File/83314836819.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/finopurodasib.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/29718278995.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/161344c2f64507---dobilivisijubuselivel.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/48938904018.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/27790511885.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_off0000e4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D0 18844 bytes
SHA-256: 7c522af919752714dbd59e6f0eb481d6449daede1ea58fee3f29df57b44cb649
font_01_sfnt_off000114c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C8 10284 bytes
SHA-256: d28a6e37df2dcc8ebfeaf6a18314d1beea7e38873d98073be556d584c078a546
font_02_sfnt_off00012bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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