Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a65bd2d0922b5d…

MALICIOUS

PDF

91.1 KB Created: 2021-09-16 19:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2b98228964da7528a360f29c78cf03e8 SHA-1: 4804fe116f43bc6fce5d62113456ae09c2a27760 SHA-256: 30a65bd2d0922b5db5e34891ded4f4906a181e60a679f689c7ddea5f84c69c34
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to disposable domains and utilizing UTM parameters, strongly suggests a phishing or link-farming attack. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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=tamilgun+new+movie+hd PDF link annotation
    • https://rh4-h1tapi-turbo.com/contents/files/64548859982.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/87297393656.pdfIn PDF document text
    • https://lotteppta.net/beta/assets/file/bukemo.pdfIn PDF document text
    • https://badeluxe.com/userfiles/files/23256274713.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/lolewojokepibubiwone.pdfIn PDF document text
    • https://slide-bearing.com/d/files/bizukijopefikereje.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/47847489690.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/60246577220.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/konaxekime.pdfIn PDF document text
    • https://konzolstudio.ro/uploaded_files/file/29128560823.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/wibowezupiruxam.pdfIn PDF document text
    • http://krzeptowski.pl/file/lafuwodosoloredurafusux.pdfIn PDF document text
    • https://shih-tzu.ro/files/file/17345906188.pdfIn PDF document text
    • http://w-mill.jp/images/file/jifurawokoj.pdfIn PDF document text
    • http://handgun.ee/media/file/mafotinasoromemo.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/xerusekiwi.pdfIn PDF document text
    • http://inica.org/files/file///63684296942.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/34407334497.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613401e09fc6c---bolumunetanowetewuvak.pdfIn PDF document text
    • https://semut73.com/contents/files/votemuzewipugotow.pdfIn PDF document text
    • http://xn--5dbfbdrd7azav1bcx.com/sites/default/files/file/82275307338.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/jobazolosodamo.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/36336340244.pdfIn PDF document text
    • http://studiofelician.com/userfiles/files/sisifatubipamuv.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/17488887747.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_off000101ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000119ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FF 17456 bytes
SHA-256: e7ec342f7a2754a62b3319dd50606997f1e54779573c42c5e579fc0a347478bf
font_02_sfnt_off0001476e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1476E 10544 bytes
SHA-256: a619df928a2f5e819d72d2d69414570b3c389362e6823d21478a7cc030a4aec2

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