Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d259f4abd47298…

MALICIOUS

PDF

89.6 KB Created: 2021-06-30 10:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5c95769a3c6da096563ee4d1f0b7a18e SHA-1: 1807c4943db8868b17e5cad5205f74ad74caf828 SHA-256: 69d259f4abd47298f8f52208f0003744b6b8e1e9947333e755a605b73285ec47
116 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, likely intended to host malicious content or redirect users to phishing pages. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly indicates this behavior, suggesting the document acts as a link farm to distribute malware or facilitate phishing. The presence of a raw IP address in one of the URIs further increases the suspicion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608049932acb6---73436707776.pdf In PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/bd0675b65f803692366f6e80b07317cf/70883756255.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/9b27cafe2851ea40df3a4dbd413a9455/61394468394.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/23449110507.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/uean9inhclsu44jbhpthnt15l0/pamifo.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/patusifiban.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609f114518629---lelukenipawaju.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/6611386074.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfddb3eb3b---xobololimavigarisulule.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2339d79ce3ab18ad75b340490f4573f9/welegilejedevosof.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/4jflmbkm16phrqrltfdp14ccn1/sivemufuke.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bd59599d56a---simojapobunutevo.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/83507731739.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/6c32cfe12885d44ed18871ecc18d564b/nurivitujofudam.pdfIn PDF document text
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/zevudazefemotidobagu.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae00b766edb---norurikuravizaxosefimafak.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/wilibalan.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/ajdk35go3jh6mgdsta3mgg4la2/lagimatiweleminorafet.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607593164ddb9---fepiva.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a744d99ed52---vijofutiremipo.pdfPDF link annotation
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ih7idltjr1hcacd8tutrtjp0j1/21386266557.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/4gdb7q034b0uia6vi6pi149el7/banuw.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/64244498204.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/71002843197.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+find+k+for+first+order+reactionPDF 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_off0000fc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC52 10592 bytes
SHA-256: 2f0376437c9e2a867477d14a4eb430aab42386da8ee68826dcf134161759fcda
font_01_sfnt_off000114ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AB 16904 bytes
SHA-256: 060b49c547f7591e3c71fe1d74238b695288c80e491dacbae4e13770b77fcb79
font_02_sfnt_off00014106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14106 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1