Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c02aa9c6265ae6d…

MALICIOUS

PDF

109.8 KB Created: 2021-06-30 06:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 39863395299f486d247ba38d09602bd4 SHA-1: 1a7ef7984e31e6807f69b0937ba3dc45008dd637 SHA-256: 6c02aa9c6265ae6de18c6287377101cac93b45d3cf4d6fa54ab3f3eabf31fc29
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://davidfoleyinc.com/userfiles/file/33131325089.pdf In PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/64c9a32aceda5946e62efa4d369f6f6c/posovisu.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/0601f2b2db4b4ab15d5bc9217ad81a4c/kurozoxij.pdfIn PDF document text
    • http://bmhs71.com/clients/c/c9/c97ff408e01126d63256cf68004d6641/File/mujud.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef7ab0795f---63605826840.pdfIn PDF document text
    • http://cy2hand.com/userfiles/suxawukobijiwutadokede.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/11938091639.pdfIn PDF document text
    • http://intergeored.com/upload/File/solumojapajif.pdfIn PDF document text
    • https://codecs.roimages/file/87996201080.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7c2b0d52---timuloguwabozu.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/dedamumiw.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/49272178898.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/27619546442.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce8382f5f4---1624746825.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/rl3en7mu04iicb1qdmakutqk4e/48800255640.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/24dc75655a7f164188e05fc1361bd462/bafurovepanevibevonoreto.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/pisujuvaru.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/0thfmvr1ucdvj2ei0oblgsn9lc/61618472326.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/wajixurili.pdfIn PDF document text
    • http://rotarylaspalmas.orgdocumentos/file/36131044639.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/zebusodupoluvuzijek.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/95859126404.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/f35ec33cd9642425c934992b7c291190/zugidabokotafamep.pdfIn PDF document text
    • https://bataretak.com/img/files/file/sojikokamanosuwavutuwimap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=parable+of+lazarus+and+the+rich+man+meaningPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E1 18668 bytes
SHA-256: cf53bfd03fd23b2f6dbcd5956b959431ef5badd4636cfb7b323254919ba50cf9
font_01_sfnt_off00016024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16024 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17835 16552 bytes
SHA-256: a175fd58cc7206a964821bdf499e0239571fe3704d9f852c9d98b0330ce81582
font_03_sfnt_off00018f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F4D 11224 bytes
SHA-256: 18c4db1414b40a395f7c37b2b6fada7e15c6ae88a98911b16615f8bd3dff4a3a

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