Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5967699d7313311…

MALICIOUS

PDF

94.7 KB Created: 2021-08-23 16:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 369a0661145b74c6560dbe245311d205 SHA-1: 6e6afda325a9b2cf18670dfd078b1e9f8533477f SHA-256: c5967699d7313311babee6c1ad3ccee78dd8671fca7b6accf70227951eae1956
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely contains malicious content. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites, some of which are hosted on disposable domains. This suggests an attempt to distribute further malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/85ffc14d172162c6c2f3042522e63647/bumugabumujiba.pdf In PDF document text
    • https://lockerova.eu/admin/upload/documents/63105985943.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/4422dd1ed60385cd1cc64f0982d58f8b/38532641895.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082968ed1a92---87732734071.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/10794225095.pdfIn PDF document text
    • http://ux-school.ru/files/files/6959152386.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4b853c1fb---74406003160.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/11737455409.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/78048356190.pdfIn PDF document text
    • https://bor-diing.com/upload/files/24507494350.pdfIn PDF document text
    • https://sergiomauri.com/images/file/51152247913.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/31801879666.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/varovanojilabirusipe.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/76570726217.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/27854449559.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/sowow.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/guxejipisoges.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/83003410098.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/fudizefetowuxegup.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc213ce061a---37825110405.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/f30ec8774a629d73f257240f34ee9603/dilaxojiz.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/etqkirega5dm7r3tgchnjts7p9/39631757460.pdfIn PDF document text
    • http://wohingltd.com/userfiles/60394205594.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/gakibewawelanenebokinuwiw.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/xuxakinufuwibeginizapuxew.pdfIn PDF document text
    • https://777mto.org/contents//files/67908060554.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=percy+and+lukePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAC 10192 bytes
SHA-256: 303165779e5ddf49419a258f7ece91aa8fef68485cc8843a012c7c88629e65f6
font_01_sfnt_off0001269c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAE 17440 bytes
SHA-256: a1ff8c48b722c8308825f39a3a27911989aa9bcb6224716e39190ef2bbf7d93e

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