Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb4579229411dee…

MALICIOUS

PDF

76.5 KB Created: 2021-09-12 20:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fe75b998c06ad5d41d19a83c04f38acd SHA-1: 2ca7605b098605a131ab9fd4d02fd042df71040b SHA-256: dfb4579229411deec224417aa728b82bce40a03ca082dfecaca42187828a0a5a
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 are part of a link farm. 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 executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://huntic.ru/uplcv?utm_term=call+of+duty+game+for+android+phone PDF link annotation
    • https://sport-jicin.cz/dokumenty/piganazejutebojo.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/jerugeduxabimuwavilos.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/fupulasorezep.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/10766566970.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/wekibavizejofi.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/tabuzigadopasesav.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/bemadorot.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/gopeladipiwubuxom.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/60582705701.pdfIn PDF document text
    • http://gesgo.de/userfiles/file/40075524320.pdfIn PDF document text
    • https://estoniapools.com/contents/files/77448041191.pdfIn PDF document text
    • https://vhcvietnam.vn/ckeditor/images/files/buzufetovifibetaligema.pdfIn PDF document text
    • http://www.polni.si/Images/files/17174672539.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/taduribi.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/23653797755.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b5977d312---62431635827.pdfIn PDF document text
    • http://hardiebase.com/uploads/assets/filefile/63721631259.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/wesavovoxozujuz.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/demafakefataju.pdfIn PDF document text
    • https://ms02bet.net/contents/files/69751508915.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/836947282.pdfIn PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/pejajalorividet.pdfIn PDF document text
    • http://bassonconsulting.mc/userfiles/file/27938097526.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/35361194234.pdfIn PDF document text
    • https://novsport.com/content/File/wovozevomuliwu.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_off0000c530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC530 11020 bytes
SHA-256: 36bf0aee0f040cfc0fa8a7e8b50d8cd59234ed2a7a953dcce2bf576201cce0aa
font_01_sfnt_off0000de6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6E 17908 bytes
SHA-256: e9ec2fa8bc9e4bd803e824c0cfb757fe4a76b9360d66bbc2ef46a1bfeb36125e
font_02_sfnt_off00010c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.