Malicious PDF — malware analysis report

Static analysis result for SHA-256 427e5eca620e812e…

MALICIOUS

PDF

90.2 KB Created: 2021-09-20 16:35:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 423e65345fa74d37cbef4895aec43d61 SHA-1: 8d3f07f2c7aa86b2174c59146cf7bd69ef7e717c SHA-256: 427e5eca620e812ebf52434a838b6e53f3345c03e544da16d40d272eeffbc8ef
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/b2f8v5ru9f1e6h2klccpf4a5lm/limuvigumupebujaxido.pdf In PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/xopanuga.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/33023187540.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/50971165820.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/kigupefew.pdfIn PDF document text
    • http://logicparcel.net/uploadsEditorfile/zulodi.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/54189618386.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/35981762731.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/dv44aidhimq1nr3vgvkgin0766/79279835120.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/45030909057.pdfIn PDF document text
    • http://newo.ru/files/files/64171484697.pdfIn PDF document text
    • https://magnanelli.com/userfiles/file/26192381260.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/zapixulukekowixufunokezef.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/nuseluvimakerufegekurad.pdfIn PDF document text
    • http://mrpennarak.com/user_file/file/77379984562.pdfIn PDF document text
    • http://euromarkcreations.com/new/fck_img/file/beloxivigun.pdfIn PDF document text
    • https://mrpressconsulting.com/UserFiles/file/remetores.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/50646887296.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/gulegosujewa.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/5839013605.pdfIn PDF document text
    • http://straps.by/ckfinder/userfiles/files/15538630833.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/35445881657.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/26425563256.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=apa+yg+dimaksud+root+pada+hp+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_off0000fda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA2 16920 bytes
SHA-256: 2b79c0da30842aec52e965f9e57a5c50822440796c73f88fc3a5ea1bae28fc0d
font_01_sfnt_off0001298f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A6 10948 bytes
SHA-256: 748de108b4d481c8590372a8dcdab1adedec8405ee4a960f7bcc5bcaced30d78

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