Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5c7d65979fa39a…

MALICIOUS

PDF

86.9 KB Created: 2021-07-03 09:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9caea76e92521b05b1aca9a7325cbaaf SHA-1: 817d30f7f7dc6cedf156069f5ef7c83035bf5e77 SHA-256: df5c7d65979fa39a88a8b53d3eddd1ab64c27b05ea700cea91d8ad63723152d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a2ea6f4a4---54815091123.pdf In PDF document text
    • https://hyosungulf.com/uploads/file/vovunoxog.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/kiwapapiripojabana.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/jojeruxuvuxonojepejap.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160c17ae73764e---sulumalijojupamadap.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/tutox.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/dik2fa6qomlvbr5h555bl52dt6/81371628670.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/92a64135a7346a5f750dd96d266b03ec/xovilupidadape.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16070bcf86fb8c---14675181565.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/94823658433.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/18000389272.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/fdd57f5485d575f7fbbdfab0001ac020/52161174569.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/sceb7dcvj193osh7kegomljluc/kovuzevexipixusi.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/va2ua241rah91m09fhs31nitg4/28363433710.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/da9e81bb6c44d01929c1e903ade2b9d8/sijilulixumamamirov.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/vumaxumitanojedikani.pdfIn PDF document text
    • https://avela.md/userfiles/file/9792282823.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/56726642344.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/33357337104.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/874aa274c8289b17a323a34e66542643/38796964700.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c716a512a---8025532719.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b75673c6e80---bizife.pdfIn PDF document text
    • http://wohingltd.com/userfiles/wosusoxamivakefekelokuto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=cast+of+christmas+made+to+orderPDF 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_off0000ede9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE9 10620 bytes
SHA-256: 2751d355efcf87d3da062d229e026cf5a9aeaf4d95a9d3947c86d1ce22daae95
font_01_sfnt_off00010640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10640 18164 bytes
SHA-256: ee715bbc361c8f9bef742f64501237807228a16d0e41f6551dad0bb33bf8345f
font_02_sfnt_off0001364b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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