Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eba1cd80021d0fe…

MALICIOUS

PDF

90.4 KB Created: 2021-09-06 01:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 111cc34ca92d3185caf126c2b16707d3 SHA-1: 461a19bf719f75c7f87c948c123bc385e94d5783 SHA-256: 7eba1cd80021d0fe61378e77b293afce70e529ed587e716e18ae17c889c6c10d
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDF files hosted on various domains, many of which appear to be disposable or compromised. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the heuristic firings suggest the document is designed as a link farm to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://meta-min.com/files/fubomuvoziga.pdf In PDF document text
    • https://annjulieskarpmo.com/userfiles/file/fofovovifumasenav.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/34064643094.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/nopupaxige.pdfIn PDF document text
    • https://omegaplus.bg/uploads/pages/files/rewapakafew.pdfIn PDF document text
    • https://atrax.hr/files/42926016206.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/21717508655.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/6412722019.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/png07hok1kfq1j7ubdlp0681v2/bekijibulofi.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/sorazopanurumebaz.pdfIn PDF document text
    • http://simonide.org/userfiles/file/tutazepezetejugoneguwawix.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160714fcb84d07---manow.pdfIn PDF document text
    • http://ahdjcm.com/upload/files/livebotef.pdfIn PDF document text
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/rujowepusivojigagezotizo.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/vikutixivix.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/jafovawum.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/41109897867.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/55438345379.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943d45660cd---zimokogaxoju.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/9c7a6eb0e475a3cdc2589c275b8f0faa/gapefuxip.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/mej7cd9d4c1h066gf94s6u3i3r/49236164507.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/nizurobadejavuzabofusova.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2390d2388b25507f2d6b05b2d2b221d2/kurepozeven.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/22575755637.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/pedexewuzoradobugesifuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=makeup+book+pdf+free+downloadPDF 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_off0000fdd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD2 10544 bytes
SHA-256: f16abc8016e481544ad21987f1f0f6b33e5900ce0e6c3eb22473d01b83ee08dd
font_01_sfnt_off000115c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C1 17688 bytes
SHA-256: 3ad6736b380aeeebbac6c0ce8ec58b5eeebca15cd6ff54092765286efb7a53d6
font_02_sfnt_off000143fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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