Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7bba019748c003…

MALICIOUS

PDF

108.3 KB Created: 2021-09-09 10:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e65be0c9738573634eae1f4bd61c874b SHA-1: 353b6db1bd4fbeb3fa88fd6c60be5f20cf33e6a7 SHA-256: 9e7bba019748c0038000b8dc8707c2f37749c0e5d7c2d234d069de11cdacb939
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://philabc.ru/uplcv?utm_term=manual+para+aprender+nahuatl+pdf PDF link annotation
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130959f7a6b9---93255428186.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/sesimuwuzuretaxidesorun.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/94531316087.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/fedoxetuwapofawusopu.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109032231095497.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/suzuxogupan.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/31397698818.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/5fced69d5ad46126a10cffbdc442a73d/vopudagepit.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/96551479823.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/ditofebosusamolagu.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/2345757332.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/bibosijasejuvupivaxosida.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161322a1b56d46---tireni.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/65904791966.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/zobawuxidopobobojakunakek.pdfIn PDF document text
    • http://citysoupsbellevue.com/uploads/files/rasipepamigokusoxevorakik.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/noroxam.pdfIn PDF document text
    • https://sharenkon.com/files/mepodunapavapugisarudetoj.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16130592b21024---16486948276.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/56117141719.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/87790720349.pdfIn PDF document text
    • 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_off00013ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA4 10308 bytes
SHA-256: baee08ca38510eb001accc05c0ac81fd477c2126eec702809177f18599ffad44
font_01_sfnt_off000152bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152BF 21660 bytes
SHA-256: d806a1ee59f55bf8fcab5762dd26dda8f2dbbf0de027eb74bf5b0e69cc95932a
font_02_sfnt_off000189e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1