Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db7f739997bb115…

MALICIOUS

PDF

73.3 KB Created: 2021-08-18 22:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7210066864d100b47c51e04a47bf3b16 SHA-1: e22864a448b72038e6bf13e624b7e22541585b66 SHA-256: 1db7f739997bb115bd14e3da696d40298cbc27bc756dae3b509f18ef1e22a09a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/10357c1edbf3c8b3df12420e75dbe18b/44203038707.pdf In PDF document text
    • http://oakgroveschoolheritage.com/clients/b/bc/bc5c94904a1f00f1300372e6f875146f/File/mewavotopatuwekixoneguxul.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/56397693142.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/dudobatonali.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/56721967559.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/ef5c464f3d827248c54abeb69d7f355e/15184029075.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/gevukike.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984c24e601c---mokadurenibo.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607cef4797286---74379541948.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/defaturekagidejotele.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/08nj2nt920hbs05o7hjl2d3bu3/lejasemubuxopotep.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/6759219859.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/mowakikived.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/vepaxezajudogage.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/93340114495.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/699dd0b9108086de3f9cf624202ae435/63724372455.pdfIn PDF document text
    • https://asiajitu.com/contents//files/rugorado.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607e45a7962b7---setajukuzozogakogexum.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/t20dvug466r15gceled50jju76/vusogutumiroxuzubemurine.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f64c477f88---48695020224.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/wukototipalusikajo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=dihybrid+punnett+square+practice+problems+answersPDF 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_off0000bb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB0F 16444 bytes
SHA-256: 140588da94cdbde4e224ea004df7acb01259a6af4a93d2cc42d756ead48e0114
font_01_sfnt_off0000e5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AA 11368 bytes
SHA-256: 3c7d1a7b88049bfc8b791748da19a8ae6481702bbdf6dbb4d89acdc5a2a97a6c
font_02_sfnt_off0000ffe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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