Malicious PDF — malware analysis report

Static analysis result for SHA-256 59273affc2b5fb9c…

MALICIOUS

PDF

74.1 KB Created: 2021-09-04 16:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5372711a26eb3277c145ac58cbed39ef SHA-1: 8054420643d3223cfcfe9d57585617eeeded25dd SHA-256: 59273affc2b5fb9cf5727d0c6c5c4d3da0478baa733f116e7497e305b348e523
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous links pointing to compromised websites, including WordPress installations, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded links indicate a likely spearphishing attachment used to distribute further malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/7b509f05ad93f66b95b6664954a14655/20563183912.pdf In PDF document text
    • http://bocghedanang.com/media/ftp/file/36497963768.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/81062235819.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609295602d6f6---72805519709.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/ridipuzip.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/097549cadaf33036605f83c01c16ce67/21095495613.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/90212457655.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/a7pdtmtr4km2v9cjf5vku1oapl/dilofubukotagisezobidil.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/a608049ffe3adb6c3281bb2356a8e6f8/mikogif.pdfIn PDF document text
    • http://beateromer.com/bilder/file/pizobetenukivaj.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/fidurekifivufuma.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943aa1d92ce---17644344375.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/dlegn4vr7fotbopioj1tg1hr1j/75976533663.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/toxozugavolufiru.pdfIn PDF document text
    • https://dalyanestate.com/userfiles/file/muxoxilovugowosi.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/41854834129.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/55764169041.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/zubapad.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/0c314d158859b725ca8008229346aa2c/58977576187.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160732c4e24c10---62190202890.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160779b1db61f8---gilotu.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16110f8f9ca034---22019207546.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=employee+absenteeism+project+report+pdfPDF 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_off0000c0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90B 15652 bytes
SHA-256: 3186bcc6848801567e4865bfa55ea2667c085b17d142c79d54fa927b72ad3b9f
font_02_sfnt_off00010124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10124 11148 bytes
SHA-256: e1fe30a44571532d25f9199ff447f227e53220eccd97b1b3175de47912a8a90b

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