Malicious PDF — malware analysis report

Static analysis result for SHA-256 6febc727052fbd99…

MALICIOUS

PDF

95.4 KB Created: 2021-07-19 19:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ce354c6b43a1cd4f727f67cdd0e62091 SHA-1: 6d76287fe108a8cb585bdb26cfca92f2596f8796 SHA-256: 6febc727052fbd99f79029b15d2378b1a0f8d4fc74e8510b018762f066f3b6f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to various websites, many of which are hosted on compromised CMS platforms. The presence of these links suggests the document is intended to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.hgbehringer.de/img/files/files/wupijo.pdf In PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/d086a362d090af91fa68c07e126e7c6d/25975582604.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/82f94daa8d6892b28a8ec8d0e0e9f057/tunudenexewedopobo.pdfIn PDF document text
    • https://egca.fr/userfiles/file/muzukijasavuranegegagakot.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fcbd9d26b---lavodabafemoxowetit.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/99776018216.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/cc2d7a8c201f5f8b5190b20b47ebc71a/16826555913.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/23340377460.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083202637b08.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26c419e731---dupud.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/98462672667.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/vewidedipokizurefuvebabuk.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/penaraxamivijuna.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/aecd0feacfa1daa1a34f4e54f4fb5e22/14243883071.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160741774684d1---zivovul.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16071720c4db28---20593370791.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/30956040523.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b2f6a5622---21213794909.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16093a83f63baf---54875551687.pdfIn PDF document text
    • https://bozoklar.org/ckfinder/userfiles/files/25243186836.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/370cac920ee5d12b81e8af17860a1ee6/68577920873.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984f708745f---bidatazaxizafiwujow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=hail+holy+queen+latinPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA1 18756 bytes
SHA-256: 2c9df8bfdb4dd53428920af0e23426010d50208e22cf4c41931efaa154b6ee75
font_01_sfnt_off00012a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001429a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1429A 10288 bytes
SHA-256: 5df29b93109edb9ec3d384b0837d3b3b5b56515f89a707a5502565bca2f351df
font_03_sfnt_off000159a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159A9 16300 bytes
SHA-256: 20a1695dfcc3a50c901ab6dc6f9198566fb02193bb46d0ace012046d7a093f0b

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