Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc31cbe4b250904e…

MALICIOUS

PDF

80.6 KB Created: 2021-09-13 05:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 60a67df31d638f6e41a71c2b69dbd072 SHA-1: 4bb0dab650d9eb747061b91b4bc8bbd2b90501c3 SHA-256: cc31cbe4b250904e89aa2ae1c6128fec9177a285bc59101a0506f27c4b2014a0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body is unreadable binary data, but the heuristics and URLs confirm a pattern of redirecting users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b06449b7e---87997486563.pdf In PDF document text
    • https://classoft.ro/userfiles/file/39357516894.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4c021c0da---zipopiwedutidojeg.pdfIn PDF document text
    • http://erh-hu.com/userfiles/file/92068100830.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/lilepegasuloxovibisafeb.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/78090691247.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/zoxadodumulirav.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/kbbl3gjb1enukjn8h6pfgu6f63/lidevevesat.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/58413644778.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f64955925---62459494069.pdfIn PDF document text
    • https://desco.scp.hr/files/gibejejokowofojofugopa.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26217695352.pdfIn PDF document text
    • http://kdekdyjak.cz/data/45075915742.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/tubupagor.pdfIn PDF document text
    • https://peperita.it/writable/public/userfiles/file/47234619968.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/dorisonajejekaguwedonineb.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/wonelowomasezazerexu.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de2b3da34e---83149750856.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/mudotumojumipukabufiz.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/kuvudumufu.pdfIn PDF document text
    • https://copacndg.com/images/uploads/files/duvor.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/10702428869.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/19679729868.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=four+sisters+before+the+wedding+full+movie+online+freePDF 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_off0000d546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD546 17644 bytes
SHA-256: db40bdf5050c51a804d0186a293e12b570099dff5a78fc33ee2ef0a1e71bb1a3
font_01_sfnt_off0001034c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034C 11008 bytes
SHA-256: 3ae1bfcac4ae111805ce02c98229916dadb93d34511a44303a7d8513c2acbd88
font_02_sfnt_off00011c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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