Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9cd2d729090a6e…

MALICIOUS

PDF

91.7 KB Created: 2021-07-01 22:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 149dbed6b2e55a93fd2ea2e63db06fe7 SHA-1: 7611a8730e901b26308c64019a499a98adbe79d5 SHA-256: 5c9cd2d729090a6ed11286b0bfbd39fbfc70e03cd09dbf48c3c1ba16cbdbfa08
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting it's part of a link farm designed to manipulate search results or host malicious content. The presence of external URIs and the link farm structure indicate a likely attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://barksdalereunions.com/clients/869108/File/mamirajekegotuzokiki.pdf In PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/13832487642.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/novipufobosejotevefebi.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797a98cb731---wizenerafuxerog.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/53050298793.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/ed7efc3130c51d200ec3b1e9998a6903/90839953456.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbad2436ad1---61290771921.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/fba3b3a4b45aa385ad2b931090e6cbc4/22036181362.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160776e0f805c3---35531071748.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608294f8c7ee9---giwikisaza.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4a49b8b73---41518521193.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/6963955622.pdfIn PDF document text
    • https://butagallery.com/userfiles/files/katomopugemoxixusek.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/c68886f1e5b2f2a004df64c905afda2b/9687026566.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ba675f0a5---dexof.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3ca0a453e---24384545258.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/zitakinizosufedi.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/zudavekebefu.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5e1fa7bf3---60260415571.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/waduzum.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9db6d67a85---digosuzeturonolulufopa.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/67496121334.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/6cadeca49a114b7a1f4a9d8620bc47fd/52912501356.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdd8ac0e22---2087921040.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=need+for+speed+carbon+cheats+pcPDF 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_off0001018c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018C 17876 bytes
SHA-256: ce29c41fd4478905714a040d99474eca5e290d1d470ecb0e8ee95404cb5d4a2a
font_01_sfnt_off000130fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14914 10696 bytes
SHA-256: 0473c57ace3d1df8397d4587e7ebb0bb55e6c194c8d34c8ea9bbf2b676e81f13

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