Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a80ee0f9d40702…

MALICIOUS

PDF

70.9 KB Created: 2021-09-27 18:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: e1be05942bba10ff7d0a29a66e983ab2 SHA-1: ebb97608a679765788399bb45605b66b270c72ea SHA-256: 80a80ee0f9d407021cc6c4aa4cc48fdc3af40a195c9ea762f2bfabf265c60caa
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits vulnerabilities to execute code. The document contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or redirection scheme. The presence of a link farm on disposable hosting further supports a malicious intent to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://chcial.ru/uplcv?utm_term=how+to+take+a+screenshot+of+snapchat+without+notification PDF link annotation
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/4a84695f44025a008966f32844e942b6/24189658670.pdfIn PDF document text
    • https://tigapilar.com/upload/files/2384989662.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/18867586968.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/17372856894.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/4296b4ded145b7806f88aaaa5d9dca90/42988883588.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/pubudasaxasukorivepozafen.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202109072108516704.pdfIn PDF document text
    • http://gotween.com/userfiles/file///xelona.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161444d30aaef9---nugipuvuzomuxipedav.pdfIn PDF document text
    • https://b2bircruise.travflex.com/bot/ckfinder/uf/files/jazurodane.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/34952156301.pdfIn PDF document text
    • https://gibidesign.com/fckfiles/file/lipemawevevoruxejugurewi.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/28779446388.pdfIn PDF document text
    • http://xiao-bao.com/uploadfiles/fckeditor/20210902/file/16305976714033.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/71685636738.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/kojomipasamegudipopumug.pdfIn PDF document text
    • https://morabia.fi/images/file/tukifipipenumabifi.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145f80042433---futajabuxalodan.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/32079704921.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/161487578bac41---wepabisixawadalibu.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/s5f3chuebodf8t8av5m3q5h355/giguvekekobup.pdfIn PDF document text
    • http://strelnicebudejovice.cz/userfiles/file/jatijapawuwupixemowafabu.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/50084888362.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/4855734758.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_off0000b414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB414 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2B 10800 bytes
SHA-256: 8d27c5b85633404219b1efec2128cb24bdcdeb7e83945723cbf27dc5b89e26de
font_02_sfnt_off0000e50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 15900 bytes
SHA-256: cbfc5d8b4fc736e2974aa6ebd532e7377774dc4af5036dfc9f6bfbafb5f8554e

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