Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a9ebc6c80dbe29…

MALICIOUS

PDF

77.0 KB Created: 2021-09-01 22:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 51589f1626e12c2e153b80d0ff49e28f SHA-1: 89bc8da16bce78d32167e0674641200ae900dd3b SHA-256: e5a9ebc6c80dbe293168f6c06c7215e1076a7a2eec52e35be9622e377cbed746
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or redirecting to malicious content. The embedded JavaScript is a common technique for executing malicious code within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://0-50.ru/userfiles/file/wabadogifovaxutam.pdf In PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/jewerinavavoraj.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/7b1e15e43b6e4d7d6da6fca5737fe021/15194195543.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/63030048795.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/zasamamuwidilata.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/gexuxig.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d064675e7---pasutax.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/486bfe1d390176dda59dfa677268a45b/54355245153.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/429k2c60ufq439qskpmmdanlhj/poxesiva.pdfIn PDF document text
    • http://meechoktoolmart.com/user_img/files/lixozegoviratulineka.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/e345b400c2fe7d82915fa411dcb0b336/xunuzigi.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/1rr4230ajcq7qsko7mrv1rcji7/palefososakadazopikav.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/12431819076.pdfIn PDF document text
    • https://classykitchen.pl/web/uploads/files/96559614320.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16073951131014---96419586262.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/48929c7c6b05478013b24205b0aac76e/5046454025.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/mowaw.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/muwutokabupasigikepoto.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/38469398319.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/66743669372.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/111854531995.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=effects+of+deforestation+on+ecosystemPDF 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_off0000cb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB63 10688 bytes
SHA-256: c5914b47e0495ae155c3fb7246c4e70484303d28e1555b277b3e6a5d176ee0a4
font_01_sfnt_off0000e3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFD 16356 bytes
SHA-256: 91f0c85bdc44b1127096823206c6185c20b68c4650a0c3df5a52f629753feb04

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