Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe788af45c4f714…

MALICIOUS

PDF

100.6 KB Created: 2021-06-28 01:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e964e2a2f866e0c0b4a0fec4924c927f SHA-1: 26e48ed70c7447cb7199cbc666d9b82670cec1a9 SHA-256: 0fe788af45c4f714177fba844c2092628132e0b7769ef0a248ef20dc594c16c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL analysis point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://www.asslar.de/downloads/78927643065.pdf In PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-6-25/20210625221721403020.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c940d8aa79a---lomexefama.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f0493a9ed---11445633115.pdfIn PDF document text
    • https://securitydm.com/slicice/file/jugoba.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/geini3dor113laides0vh86545/dizasid.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/abfde241bd502ff10f515207e8b729bb/fipekikepul.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16086bd8c43585---12639616143.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/d8315894615b8a3adeb7f006ee8864fa/gogigujelirovi.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/743bf8cd0dfad7b2d5870c717703874b/83245840662.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/b19ca0a76409a7b56c2749a286804007/pubipugakef.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/95599989901630618d06f96ea944c573/27477793953.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/garubakibidababufufirov.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/46d7499cf768ce59550489a1b19b2580/gowogumaboxadaturijuji.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/kajutilosovixu.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e01a323599---pegakume.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/69da72fa279bcf9ab6722f86510eeb1d/daberujubeno.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/f148bdeceef5a2bd18618444922eb113/29653658607.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/9a2633e00313c057a614bf021f484231/22974284914.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/21646313313.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c36a1f9e6b4---83556196859.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/37fd900462637e23f39fab53bf329280/bibawadiwuduwipigew.pdfIn PDF document text
    • https://vyrukrc.lt/userfiles/file/gukivomedoxa.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/18816593148.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=who+is+the+girl+in+the+clear+tv+commercialPDF 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_off000126d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF0 10736 bytes
SHA-256: c93c7fe05ef5b9cb3fc31d56c64c565ae05ee084a5dcc341050176b90312b517
font_02_sfnt_off00015779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15779 17312 bytes
SHA-256: 10d509d5dcdc611549273d05f27ef9e3062562fe392884e7a14c49663e6ea381