Malicious PDF — malware analysis report

Static analysis result for SHA-256 1717fae19f51c888…

MALICIOUS

PDF

93.4 KB Created: 2021-08-06 14:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9ceb795d23461bdde044f3c63de1ba9 SHA-1: bf47ef56561531743c82b9eeadc63f2321e2d364 SHA-256: 1717fae19f51c888ca6f8fe867c68718b5cb1eeb9d5e2e12f7411044f55eb78f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host phishing content or further malware. The presence of numerous external URIs and link farm heuristics indicates a phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://irlanc.ru/uplcv?utm_term=junie+b+jones+first+grade+book+list
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/b50cf7ace0b99f66f2c3ca220e96d671/wizikexurojuxigita.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/80jqdgpq8ncspr1cfsnecmnvnc/61342553917.pdf
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/29277428278.pdf
    • http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/vuwivizukekef.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/fb1da6d92ae54666dd2694cd70b23bb8/63332466115.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071c21addc52---74177536855.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/fa6umiksbapoefv4ou4dbpfd4f/wuleduvufukeso.pdf
    • http://crackershrimp.com/file_media/file_image/file/volex.pdf
    • http://ctnphrae.com/ckfinder/userfiles/files/90646573987.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b30bf566c13---17761749115.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a98583364ad---penodosawinevajejomi.pdf
    • http://softtox.com/new/userfiles/file/24524119851.pdf
    • http://bijverhoeven.nl/uploads/files/44223822475.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/471de4642e63240951daa9d9ef2a9675/92117813882.pdf
    • https://amrapalispot.com/userfiles/file/93496257221.pdf
    • http://kzlo.pl/fotki/fotki/file/54925302888.pdf
    • http://studiotecnicomartani.eu/userfiles/files/merisozuzilubabiluveni.pdf
    • http://dentherapia.hu/files/file/tasezejafelukafotakiz.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6252af2e5---jigakusoxejejeman.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2f860fcee272359483b77387bf7f5093/lelar.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/ecf02473fed31fc2dafa6c6f9594dc6a/minosunavumazalerasixig.pdf
    • https://prairieroseclothiers.com/FCKeditor/file/5566898758.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010771.bin
bf53a30739bef0c2fd5e95bda22edb4c41ebc48f9c6e4899ea4489f5e8e5a5e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10771 10980 bytes
font_01_sfnt_off000120d4.bin
c1a64817232da6a21ac0834dba5d5a2624436e0136a459448da5225df47dc860
pdf-font-stream PDF embedded font (sfnt) at offset 0x120D4 17800 bytes
font_02_sfnt_off00014fae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14FAE 16792 bytes