Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb264ed3982afdee…

MALICIOUS

PDF

94.5 KB Created: 2021-09-09 23:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8d496fe310cf3ec76feca0ff5d11287f SHA-1: b90856509538862309f95e17bc9dacfabb20d9c0 SHA-256: eb264ed3982afdee71ef788993e7f3a3bdab3ea153a6b426cbb34d06117575d3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The presence of numerous external URIs, many pointing to potentially malicious domains, suggests the document is designed to redirect users to phishing sites or download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://testpensija.bankai.lv/ckfinder/userfiles/files/sirobokof.pdf In PDF document text
    • https://dbjadow.pl/attachments/file/filedusenifipenepax.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/64308606276.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16134cb1e07a1f---46792642114.pdfIn PDF document text
    • https://momentous-inst.com/uploads/image/files/34786487045.pdfIn PDF document text
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/16186096090.pdfIn PDF document text
    • http://budropol.de/Upload/file/jufasoxer.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/gapokanevosilabimofefe.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/35109816996.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612fabf95e2bf---tironuzepefep.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/24755004045.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/wukewofudiwolekajesokubi.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/16231728443.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/rapavumuxomagutosu.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/19771994609.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/zifajumaxovoradugepe.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/98377699817.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/39100346645.pdfIn PDF document text
    • http://www.itidharamshala.in/images/uploads/files/36571631616.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/jesus.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/bolazogilawixejonoparadu.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/bowatexeli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=3d+shape+of+dicePDF link annotation
    • 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_off00010cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000124c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C4 18436 bytes
SHA-256: 0fd06b20b4735e70f9ed3c88e6d848a16eff6651c8fc224a27bbec43385679f8
font_02_sfnt_off000154dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154DC 10444 bytes
SHA-256: e961ff667ea7c6d5f4ac22d03c641b0cf8623e80b89c1d9697319c4e9914fb61

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