Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ed693b97aa84ff…

MALICIOUS

PDF

75.3 KB Created: 2021-07-06 15:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4010074cca56d9b74c332b5a12a8b9a8 SHA-1: a1531afd78e6b33c4c8bd28ae255d8f8a4487515 SHA-256: 72ed693b97aa84ffd2c23358bb852bffb87321fb9de6f68d541a0b740668fdf6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs that point to compromised websites, many of which host other PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to create a network of links for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://medvor.ru/uplcv?utm_term=how+to+recover+recent+documents+in+word PDF link annotation
    • http://firmykominkowe.pl/Obrazki/edytor/file/pewiton.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160996d67a8352---80447875674.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3c7c604cd---beredokara.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/61416066083.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076e7a446a13---40839621716.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/gll45gkh17tcjlu3l6khr2pjo5/75907356643.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/78955b57946b282e9ddb610a865e990f/jaxusetuvuga.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160dbffcba408c---dosopaparogudaxaduvovola.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/2636674588.pdfIn PDF document text
    • https://moscowfashion.net/content/xuploadimages/file/8997576644.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/46198271539.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/ae7126eed250a860dbba2997f9b05834/zojaxadasakonimisabi.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/5d07fud0ib6k53n7hlprg5df3o/69883148476.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160778d45e373b---99994686108.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/mutejazebak.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4dfee22b77---jenorogusuja.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/newowewakudetijukolefaj.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608acbf942e08---zepeser.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/362f19b4dbe61e9fe56bc9a18f649145/vamifirilodoza.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/75492560181.pdfIn PDF document text
    • https://aashianarealty.com/file/rematujonovipiv.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210614/file/45011843953.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b291e79fec4---65165769228.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608770f503520---11304767954.pdfIn 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_off0000c4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B8 16580 bytes
SHA-256: 4c130ed227ed37f6e85b8f4dee06efefc7208d6029b7189e0e6cc352be9be2fc
font_01_sfnt_off0000ef93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AA 10568 bytes
SHA-256: 78c7318078518359544d117d7dac9731966c56458e91660e94e52e6585703b4e

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