Malicious PDF — malware analysis report

Static analysis result for SHA-256 5024a710e2608e16…

MALICIOUS

PDF

89.0 KB Created: 2021-07-27 09:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 74622d982ac08f7b5b9ea36b0f1a445b SHA-1: 099a4aaf06f0f7ccd11452ec13569a4a536252a2 SHA-256: 5024a710e2608e16d553942fcbf97730bf8ead294b2f0a5ba57aa31655e9b31a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting domains. These links are likely intended to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 https://pui-vital.ro/msg_media/file/wavugebovow.pdf In PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/jb495teqo7s4q07dps46m8qsn1/78925231968.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/1f2sruo8gctpsav6lhivi099q4/sojixezaruzupovabepuzel.pdfIn PDF document text
    • https://magerp.org/upload/files/8370624746.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/xovigerivirugesaf.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/ridukedu.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3939b85d01---31809250038.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210609012934.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/tetudimepusatalago.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/linajiwezuguve.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/61627266844.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d19578796---33174329196.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/ritagakere.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/mslg672hmaabl7hpr7v6njf9hi/jolupigituwafasodawozedej.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/45630414537.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/4d276d2144c34e270656c9d5a0d48694/63438441504.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/43479090607.pdfIn PDF document text
    • https://baptistfriends.org/media/netigefevuzowidud.pdfIn PDF document text
    • http://greenld.com/userfiles/puxufebufoxurepidido.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/xurepimud.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/dafa038ce2d5954eca1c9c47e07e3405/rofixixe.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/67876640196.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/h9f2emcbvhqm2p5drgivslmc72/dorurejewusaxovuletinekoz.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/xemurorafi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=pressure+osmotic+exercises+pdf+downloadPDF 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_off0000f1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F4 18516 bytes
SHA-256: d339ce8ab4c4b4cf5bb9d8c7b7e01d7f1d627886d18f9ba16f587569c354f727
font_01_sfnt_off00012366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12366 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B7D 11072 bytes
SHA-256: b237ce4054e7b69d1bfc4606ea527569f6dc0b84ece0b39985418c604f6b24a8