Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf26e89134b04644…

MALICIOUS

PDF

72.7 KB Created: 2021-09-19 05:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5dd5f74ecfc90c46f751a4063a506a74 SHA-1: 8766029d019be302aaa83d3099f512ccee46556d SHA-256: bf26e89134b04644c569783eb7d0f0e6822b962103d4b2ddfdf46c2bfe05486e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs, many hosted on compromised CMS platforms or disposable domains. The presence of external URIs and link farm characteristics suggests the document is designed to lure users to potentially malicious websites for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://nomylo.ru/uplcv?utm_term=les+liaisons+dangereuses+pdf+english PDF link annotation
    • http://kerekesvillszer.hu/UserFiles/file/xafatubowowenututesizuva.pdfIn PDF document text
    • https://democv.associasuite.com/imagenes/contenidos/files/74514577436.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/kudaropalumejopuxopo.pdfIn PDF document text
    • http://sasnowosielski.com/ckfinder/userfiles/files/karorajabuwejowusefe.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f15e8b04d8---gaxegafagixesavafa.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/rupewopibifoluxuxojafofu.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614111b0d4f83---vorojepo.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/vigavupijozepewara.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b91a91004---vibimumapox.pdfIn PDF document text
    • https://castel.ro/userfiles/file/61780885966.pdfIn PDF document text
    • http://tubelessons.net/cms_images/file/92957891362.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/83836230717.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/59778011183.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/rawifelekujegumi.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/43181549784.pdfIn PDF document text
    • http://hagithanh.hagigroup.work/data/media/files/65344750011.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/1569327001.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9ee6a7ff4---wujutopufoboperazevinuweg.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/wiguwuwi.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/jetemuvaxuretameres.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16140b25f37975---fipurukejavujofetowin.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/89542252967.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/25700902290.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/kuranesedirojipa.pdfIn PDF document text
    • http://evrokomplekt.ru/userfiles/file/taxakusig.pdfIn PDF document text
    • http://96rangjai.com/userfiles/file/sebixakupubilew.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_off0000bc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD414 16356 bytes
SHA-256: 25b4e6f7d5b15d3b6459c60df7dad6153869bf001ca8133f491b25729bb960d1
font_02_sfnt_off0000fcc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC4 10736 bytes
SHA-256: a1f9e62cd548ddf76790c9bbd2cea93318d9b4637553dbb1092ac653ef167048

Open this report in the interactive analyzer, or submit your own file for analysis.