Malicious PDF — malware analysis report

Static analysis result for SHA-256 053a7c39ef02c4eb…

MALICIOUS

PDF

93.3 KB Created: 2021-07-17 03:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: f56659d1980f5ba70e97d26e35b78151 SHA-1: 29947fbaffbe195ef4e4eec83e7d5c20af855d4d SHA-256: 053a7c39ef02c4eb18ffd299ec1f66ce65caada0c8faab01d0bf94a38a9801ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a likely attempt to redirect the user to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a66f4daa8ed---81150086956.pdf In PDF document text
    • http://architettoseneca.com/userfiles/files/89155645840.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/90775089919.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d45730cd5---81600478288.pdfIn PDF document text
    • https://citytrafik.nu/images/file/54640287668.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/fccca1e144a6201156359472b6f892f6/jokozomiribodu.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16075e789084fb---kibopomapodazemedi.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/c1eafe22783926a130427873e150a5d6/19415968296.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/furagokoserakoruzaxomob.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160930c42d234b---zipapodig.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/77952715645.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/f1ffce41292aa1b00610692fc2f8ea7b/71242744629.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c8ec40e3514c11e68b815f0dff8249da/gekumovojaxixixanipara.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/28091090893.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/42412f6cd77886d988b2ba3094e94d3d/xaxewugowi.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/9684db7a9383b8ce9d7f2806075621ec/kamepij.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/gadikerafe.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/53088976912.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/64342063837.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/345ce104cefa0ed1b130aeb5024a3b04/4986286734.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/24003145686.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/1aa5a3c24b46403ef4c1419e3f1a9488/zidefogelidiselanikoxefap.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/160967bb76ccc7---zimimewuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=lake+honrich+quill+locationPDF 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_off00010751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10751 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F68 10456 bytes
SHA-256: 011cf6a607d49721ff68c2c2145cba04f6ede8ff0d443317d6e68a5117878a89
font_02_sfnt_off0001370e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1370E 18044 bytes
SHA-256: 24e6fd4ff1618a61f34fa538844667c43388a22ac35de0a45e8f92480920b465

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