Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a182c532272d1f…

MALICIOUS

PDF

85.1 KB Created: 2021-09-06 01:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6aa1d0e50328c9b5c87aec38fdde6fec SHA-1: 767a7b23732a3d93d9d0c380b7a587209f868f81 SHA-256: 97a182c532272d1fa16686024febd21a117ab7c80c7a2b72e474528ce100b995
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to various websites, many of which are hosted on compromised CMS platforms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161045c79321e9---70865176908.pdf In PDF document text
    • http://synergienetwork.net/userfiles/file/57754584692.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/d09b5ad058c1e89e8c7255fe29c4dc4f/42663340959.pdfIn PDF document text
    • http://dahchen.tw/userfiles/file/gixirurelupunovirevak.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/fc63fe0473933931e355674aa55b0a02/xelojutufavurijireb.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0cb4e46ad---tavivo.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/498c5563dda83df24e478c813e9b1c5e/babokivuguledewamujeg.pdfIn PDF document text
    • http://mariangelesorrico.com/galeria/files/pavev.pdfIn PDF document text
    • http://yildizteknikelektrik.net/resimler/files/59547313603.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/wozasosusulo.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/pepibisokegur.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/9537b92c2ba6838fd9d8e59634b04ea2/jufibej.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/49818124474.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776044d8cc1---xorefuz.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a505a0cf4---boxilufo.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/sogasezival.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/37327424625.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/jisaru.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c79d452317f---83145558327.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/91771584697.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/51957567984.pdfIn PDF document text
    • http://pi-consulting.ch/download/zonodi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=manual+administracion+de+empresas+pdfPDF 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_off0000e78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78C 18124 bytes
SHA-256: 3d3b321da6fea0c0c334beee042045085c54d7d6462816aa39b40afb41517339
font_01_sfnt_off000115b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC8 10876 bytes
SHA-256: ea1360d0cdcd1998f6e2edc37f8134fc15cde9f9286471aae8964809a20ab186

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