Malicious PDF — malware analysis report

Static analysis result for SHA-256 4380fb5a5e5fd2a4…

MALICIOUS

PDF

82.7 KB Created: 2021-10-20 03:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 777fa64c466ab3cc2722ed378667d88c SHA-1: 4236d930343638e4fdf2fc1854f3a1b533c3051a SHA-256: 4380fb5a5e5fd2a406c956c9fe970244c9686b1727a47f2a70ad8ec7a5dfeab1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The PDF contains a link farm directing to various external sites, including those hosted on compromised WordPress installations, suggesting a phishing or credential harvesting attempt. No scripts were extracted, but the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • 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://ohmamakitchen.com/uploads/files/69957740341.pdf In PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614a0ef94c5e6---60918432416.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/zekufos.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/97967723148.pdfIn PDF document text
    • https://svezadjecu.me/userfiles/file/bidolubopoj.pdfIn PDF document text
    • http://altera.ukrstroyka.com/content/xuploadimages/file/nanumebo.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/64020390393.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f64726fe21---32433323750.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021101215553080554.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/66491913843.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/163402993982.pdfIn PDF document text
    • https://12waktu.com/contents/files/vidutif.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/1858e82e37f1224fd09779e20cf54079/mazusixugamuwe.pdfIn PDF document text
    • https://manejatuvida.com/images/file/17814471652.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/33262072608.pdfIn PDF document text
    • http://vkts.se/userfiles/file/22462011879.pdfIn PDF document text
    • http://newcityhk.com/userfiles/nonenitatawuruzoxox.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/18959476460.pdfIn PDF document text
    • http://lysfyyy.com/upload/files/48293986176.pdfIn PDF document text
    • https://mmszke.hu/files/file/lefurenezereb.pdfIn PDF document text
    • https://sarvodayasamaj.uk/upload/files/zonukanebavali.pdfIn PDF document text
    • https://fleseriuassociates.ro/files/file/xazoxitidorova.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1616344aec8ebc---42023549595.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/juvejisiwawuxiwitabur.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20211001155620.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/4dZi1sgP-vI/uplcv?utm_term=got+knocked+out+meaningPDF 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_off0000defd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFD 17912 bytes
SHA-256: d615be492a24c1f82cf8506503cc0c5922d923f9c18165f09f4f073b1603c799
font_01_sfnt_off00010d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001256e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256E 10628 bytes
SHA-256: 4f86627bdb92187a69118cc699c13ebb72e97f608229e2e811dec146efa7e9d8

Open this report in the interactive analyzer, or submit your own file for analysis.