Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c3401be884cead…

MALICIOUS

PDF

89.9 KB Created: 2021-08-29 23:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 24ec935a587242fe1bd703c11378f735 SHA-1: c30dd90c9211392498f982fc7c88138abdad9755 SHA-256: e9c3401be884ceadac1acb5370fb2b4a92f8f4dc23c1e6505858b2eac88652b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that redirect to compromised websites, likely to distribute further malware or phish for credentials. The presence of embedded URLs and the structure of the document strongly suggest an attempt to lure users to malicious sites.

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://ketchas.ru/uplcv?utm_term=give+me+an+example+of+onomatopoeia PDF link annotation
    • http://jessicarossitto.com/clients/7/7c/7c16b8c799dae9ffcd1258f31d6ff645/File/sulizulojeluzi.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ebfc3b881---pakiledopaz.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/fevurogubazo.pdfIn PDF document text
    • https://www.agcontraincendios.es//ckfinder/userfiles/files/kokofovapubemipomoxifoj.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160717e47f3307---64126376139.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/simafuziwusefazonuludozo.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607196170fd4d---sobexumubipoliv.pdfIn PDF document text
    • https://hsse.cl/files/28331586428.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/24ca6e1f10ffec60364159cefaa8cf7a/pivuzezobip.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/984b26558f469572d33a88cf237e297f/50753146039.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160944df2a7800---2423655429.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/26454077732.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/burolefesexuxivopesik.pdfIn PDF document text
    • http://riph.pl/userfiles/file/38045384175.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/remevidolobezufetalozax.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/tukij.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094de22e5660---1365562093.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/kipilebamixasujabonimev.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/92062012191.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/59554611896.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161167ad1a5b70---20745382101.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8267eac45e---disakexilukoboti.pdfIn PDF document text
    • http://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/jawejomatijilorivoxepu.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210724_63854AC8ED23A1CA.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_off0000f574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF574 20280 bytes
SHA-256: 1a4b6376e62109735dc8e3396904e0782e3519b910c3e5903f886a84465e73fa
font_01_sfnt_off00012a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A48 10456 bytes
SHA-256: b86911fb9d345ca45c22afe4d50662534547620d826bc140a23ed5a8443a8b6c
font_02_sfnt_off00014213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14213 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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