Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d08a2c74f020dde…

MALICIOUS

PDF

106.8 KB Created: 2021-07-06 12:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: fd969c24b4b774618613fc6f24807369 SHA-1: d3cd6425a0752d7ea7b5cdeb0af469962bb92315 SHA-256: 7d08a2c74f020ddebce3e7fc1e80dc6004074a031dcc35621c4387c68711f8c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to numerous PDF files hosted on compromised CMS uploads, suggesting a distribution mechanism for further malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://wagnerpc.com/userfiles/files/zibidalidufo.pdf In PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7973047fc---kawutapotidadusog.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/vepomevubogejik.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/dirarimujununo.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/tidalo.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/9eae30fe3fd7b4700ebe7b558abfb0af/poxas.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/rorem.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/e78460049e4553eeb2b0d11bfa3d2b98/44572972364.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e18e7831d1b---74881985786.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021732013544481.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c669ef194---tasafoxoxoxagetawefuz.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/nejapigaruruxumabi.pdfIn PDF document text
    • http://quocteanviet.com/img-chamthi/files/87745269676.pdfIn PDF document text
    • https://ckmandarin.com/uploads/baziza.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982ade98452---26457614562.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160977ef78c66e---78493238375.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/gufumav.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/dason.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/350324a5729fbc98a558ce6ead7d42a3/vematoja.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/7276534633.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d666372a28---80033216724.pdfIn PDF document text
    • http://amdind.com/userfiles/file/13343470984.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/fadilanaxakubofopuxo.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/16829365162.pdfIn PDF document text
    • http://���www.net-snmp.orgIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=snmp+oid+and+mibPDF link annotation
    • https://���support.forcepoint.com/DownloadsIn 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_off00014367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14367 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B79 16912 bytes
SHA-256: 3a571a9670f15973e8ed9b636782f23ef31c267b131b171a593ce569f2c37e61
font_02_sfnt_off00018792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18792 10224 bytes
SHA-256: 0e6e56220d1c3c8a0a8b006d73838ae7b9c42407439686f995ef80a833d3d2a6

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