Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f280721ad52049…

MALICIOUS

PDF

93.4 KB Created: 2021-09-04 01:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0477085d75deafb4b6ff0ba1f9040626 SHA-1: c670ee014d0d58867740db84053aff771c59d7af SHA-256: 49f280721ad52049087baab2acf367fdbc5a14cdf9ddd0cc9116e59c69e8f8e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing lures or downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://huntic.ru/uplcv?utm_term=psicologia+del+criminal+pdf PDF link annotation
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f13540c706---95175629265.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed7ce9c994---mitelerono.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/rulodusifajigi.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/depejamulado.pdfIn PDF document text
    • http://etkenkalip.com/files/metimuxadavugalowinoj.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/bupowomujokigezajum.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/cb2f5463263ac8ad341621cb148da34c/38464182783.pdfIn PDF document text
    • http://wtmongolia.com/materials/file/pobeli.pdfIn PDF document text
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/57744381937.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607190297d1cb---bezuremap.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607017600825f---82643306856.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/81416151381.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/51048659496.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/d4231c36c6706e12af0266189e732182/96986517869.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/ho7nlfd6ptm9bukecploe5mgf1/kapigijuwif.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/a5dbd789f6d039727c48d055517058a2/vaporezavovedoxixo.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128791174a5e---92421152633.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/xaduseregikuvulo.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/80248809675.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/87217000948.pdfIn PDF document text
    • http://sooam.com/files/fckeditor/file/58160741161124ceaca9dc.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/19228768256.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/3ec23eb98bc39075357c9ba8aaf5437e/10249863473.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/8de5087aac0e37cfe1dd00d06c99a1c3/ximepexirije.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/mifujubupipataxukuwa.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_off0001027f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027F 19836 bytes
SHA-256: e693b0f6d4e4e51cb005e82c210280c68f58305adb536053ec5f72eb87bc59d4
font_01_sfnt_off000136bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BB 10864 bytes
SHA-256: 80d30b15bed5df84a63ad9c708ee68f975f5ba7281cdd7ded2ad3483989d3025
font_02_sfnt_off00014f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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