Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e86d39236c878e…

MALICIOUS

PDF

85.9 KB Created: 2021-09-11 00:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 6929b2aa77b43b141318dd0ddd8417b5 SHA-1: 17338767338441086a4a3f65c460c881f16624df SHA-256: 06e86d39236c878e660f73c544d6c0abb80b8ef13abb65419a0bf948e3a293c3
134 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 disposable domains, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://tokyoto.pl/UserFiles/file/febov.pdf In PDF document text
    • http://tomei4x4.jp/js/upload/files/1554867242.pdfIn PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/98982144506.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/67326870176.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/riboxusuwagesuba.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/52184147331.pdfIn PDF document text
    • http://strandedtattoo.com/file/zurifaxurepasozinevixu.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/57255542075.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/42367819669.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/47425108526.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/muvuvufumatoraw.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/65518922122.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/58605389671.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/kifalukazegotad.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161321be753a33---gufotesibotakesuvevovape.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/repubavo.pdfIn PDF document text
    • https://bisleri.genefied.co/ckfinder/userfiles/files/jazafutisod.pdfIn PDF document text
    • https://pasarantogel.com/contents/files/44628704677.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/210906093656195541z2xkfk.pdfIn PDF document text
    • https://ijp2.com/contents/files/zixovogedezalenik.pdfIn PDF document text
    • http://pataibicaj.hu/userfiles/file/xifanodoz.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/85006033760.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/qc5094qmuqj2i3ljbobtjqke83/42195909673.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+unsubscribe+from+apps+androidPDF 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_off0000e875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE875 18280 bytes
SHA-256: f02d722de12a970386d2d86e2d931a1680d02728def4e0093d8c4e02711431d3
font_01_sfnt_off0001181a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13031 11052 bytes
SHA-256: 1e2d5e018c67075776f43cc1991bc2499f9625d3c089c93aed8af7c2e0d4d97f

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