Malicious PDF — malware analysis report

Static analysis result for SHA-256 68947337f66efcbc…

MALICIOUS

PDF

87.8 KB Created: 2021-06-27 21:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c4fc8fda9dc88dada1fe7256f2236296 SHA-1: 6c2f2a59525979e44b05e4118aa305a00e71f0e6 SHA-256: 68947337f66efcbcbf4f469c35367feb2aa4964ea6d00e7f41fc8a348fa3983d
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://crewmak.ru/uplcv?utm_term=computer+book+class+9+new+edition PDF link annotation
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/9e37d6f6acad660534bc3b0b45f4d5f9/7871588539.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/kuribajutokazokavuwaxovi.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160be70e047f6b---80727709139.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb8d7b0e6f---73315475207.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9248dc6c1---90088973637.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/4906af07798227c15d97286938754db6/savaganosapadidexew.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160c46c454372a---nibilirugekige.pdfIn PDF document text
    • http://paliukenas.lt/i/File/42979080538.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/surafifixugu.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/kviircjifd8divk94sqta2f8h1/wefitezujer.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/mepadelixa.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/0268bad552cff108642525e7100f7d13/kezamawabevufuludufa.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609171be7d981---gopet.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/99231230677.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/krnhs8ddfg9144gq99tsskae20/liwopamoxefowowos.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/rulofevudop.pdfIn PDF document text
    • http://redactron.com/userfiles/file/bulinezakovonupizolodigi.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/34160212357.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756ee4b0f4f---kifesuseferaxakitavifazep.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/b3o4uebpdjaccu9a2tj3jvk3ms/mufukexazubevufezasujubim.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/ff62b79f9e7debecef8c9488535a43d4/fotagojiwa.pdfIn PDF document text
    • http://proxima-design.cz/files/file/75802279512.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_off0000f0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E4 17272 bytes
SHA-256: 19aaf1f3a482d95cfb2ee3c5c4acd317048865be3a3e2e2b9f5754bd71bcf851
font_01_sfnt_off00011de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE5 11292 bytes
SHA-256: 902a54bdf094df31e146a232cb01fb26ed7f1698213b31f3a22e6f8150a6d80e
font_02_sfnt_off00013848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13848 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.