Malicious PDF — malware analysis report

Static analysis result for SHA-256 34689080222c4050…

MALICIOUS

PDF

74.7 KB Created: 2021-09-16 04:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f53decadab39777128c43190a635d3fc SHA-1: c9e3fa862cd47b689b5c23f8871857f0f809ebb4 SHA-256: 34689080222c4050c035a32ddf596787393e95285874c8e5fffa85ded7495bac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which point to domains identified as link farms on disposable hosting or potentially compromised CMS upload directories. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ipayon.com/root/FCKeditor/file/74015302958.pdf In PDF document text
    • https://afritransport.com/app/webroot/files/file/posufonesusepiv.pdfIn PDF document text
    • https://winstar-tools.com/UserFiles/editor/file/fekilowiwapazilav.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/14dae1e66c4270a7d1ee3e2959785340/92140280647.pdfIn PDF document text
    • https://www.orthovision-lublin.pl/ckfinder/userfiles/files/303196266.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/b57bb9c0a70cfa0c31cb1ad0de1bdd60/fuwow.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/xefezezimudijape.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-09-11/images/files/zegujovefogaretirifejofoz.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/85197802614.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/liniwipex.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210906_EE5AB6A3DD89D1AA.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/65599191659.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/rijuf.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/gepuxamowurilipexiris.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/63020247535.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408fc21a605---vodizupibugeji.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/vamutukekatuni.pdfIn PDF document text
    • http://client.diffuse.info/files/16838176383.pdfIn PDF document text
    • http://baovekhucongnghiep.com/upload/files/69260876338.pdfIn PDF document text
    • https://kiptep.ru/file/87546581236.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/bazizudijiza.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd7aa16f20---24191226708.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/revozafej.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/muzijobunudozululezaxapo.pdfIn PDF document text
    • http://it-hair.com/userfiles/ruxusojobalogasozepit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=guri+nira+ishqPDF 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_off0000bffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFD 17844 bytes
SHA-256: 03e07ca86292f154a7e94ad3ae6bad8282a81b97d4cbb0a547954fcdd4e19a08
font_01_sfnt_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 10092 bytes
SHA-256: 68c4f0379a95fc8133d9b8518d233326cc7f9dbb025d0e49fc35093eede6ea07
font_02_sfnt_off000104bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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