Malicious PDF — malware analysis report

Static analysis result for SHA-256 df00529912a4b653…

MALICIOUS

PDF

70.2 KB Created: 2021-09-30 16:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7583d40953e5f5af56699de09c156f30 SHA-1: 10423aac4d6645a335d9e90911925cda04b7d04b SHA-256: df00529912a4b653de3f37dbece6cdce40b09f410b3a21d7f9534c5dae633b74
156 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The embedded URLs are designed to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://hotelbellevuepalermo.com/userfiles/files/80644409341.pdf In PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fetetorotoloxapowu.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/19616002046.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161342812d07fc---9495321790.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/32674473735.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/070d0e51f3ab997e4b970961486f00ab/tevaw.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/piwilelafekefubutikojik.pdfIn PDF document text
    • http://sirinthepgroup.com/userfiles/file/kenufazakimagujawubo.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/xukivevojupidepuj.pdfIn PDF document text
    • http://aeu.pretty-match.com/upload/files/11472399153.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/61252448642.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/88785805562.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/26818317571.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409e08f3fe8---kebojinepejedukore.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/16212339659.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/buvej.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16139cd36ec992---17332981874.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16141c66a932f6---97702368250.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/55633660666.pdfIn PDF document text
    • http://thevalleytrader.com/files/67847885781.pdfIn PDF document text
    • https://kstraders.com/userfiles/file/93642234266.pdfIn PDF document text
    • http://rayanchem.com/d/files/fesanelemusekij.pdfIn PDF document text
    • https://mar3ol.com/Files/files/61794613183.pdfIn PDF document text
    • http://boletos.luzservicos.com/ckfinder/userfiles/files/kusimojafizisenarixasakan.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614009d69a5a7---65959861516.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=tiny+titans+2+apkPDF 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_off0000b3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D8 15548 bytes
SHA-256: 6dcc5ed4af6cafac37d1599e67198e8a4d1afa5129bad71e89600da5ec4817c9
font_01_sfnt_off0000daec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF303 10136 bytes
SHA-256: d66716920e1ae42c446048cfe23480dd128e36cda2f19fdcb74c5f9526101e94

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