Malicious PDF — malware analysis report

Static analysis result for SHA-256 7470e9fa8199b797…

MALICIOUS

PDF

71.0 KB Created: 2021-10-03 08:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9ce60ad7b7b483388f4b903fc0eadcbf SHA-1: 4079d1d3d86b2254ffce8add3e1441bc29e96830 SHA-256: 7470e9fa8199b7970153655c4c7c46793e64cb16b18fed54e01a60df0f3a1aa2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/uplcv?utm_term=need+for+speed+most+wanted+mobile+2005 PDF link annotation
    • http://drxzhang.com/userfiles/file/dalikaxumuledibovog.pdfIn PDF document text
    • http://oguraclutch.cn/uploadfile/files/baroxumakotabusageke.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/panovevibe.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/geposuxobimilevusopus.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/wazejasogovi.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/43169746504.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/jikufabozu.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/99062921553.pdfIn PDF document text
    • http://napiarsaigh.com/images/muwobaf.pdfIn PDF document text
    • http://arsvet.ru/img/upload/pebad.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/pogavoduke.pdfIn PDF document text
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/zazaniralatenaruzeta.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613df34f997a0---37361917496.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/361c95b1c5ae64637adbf50d263389d3/bofitavixiwusori.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/17541770255.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613c977c4cc24---lapujuziwebexi.pdfIn PDF document text
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/pulefirunulano.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b062e2ba7f---87124972117.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/wosamadarusi.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/kalidutojuwedulapav.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/jewudotugodemo.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16141e7da7ed97---rodirez.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_off0000b1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D2 16680 bytes
SHA-256: 399b8efd4d9aeb30bbe147876569b6a3cdbe00c2e12f34042d6bc79ef83aea44
font_01_sfnt_off0000dbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF406 11236 bytes
SHA-256: e61282fff05a7eb948982983b12f0deec57595a46d565bb1983a7797978effff

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