Malicious PDF — malware analysis report

Static analysis result for SHA-256 642be9ef4ff0e319…

MALICIOUS

PDF

222.0 KB Created: 2021-07-25 09:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9df550a9f4e83f426fc6ac2690ff24d8 SHA-1: ab2fa114d47a4daf1ff8a61f314d0c04aab69621 SHA-256: 642be9ef4ff0e3194c6eb283202d4279e8b2d6e1fe89ff152067a70f6e169eb6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. Several heuristics indicate the presence of links pointing to compromised WordPress upload directories, suggesting a pattern of hosting malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9713

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fce05dbc9e8---91052536773.pdf In PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/89547745494.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57b42c571c---28037324234.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/3222021925.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0eff7511e---62582998971.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/rr3oscsddcsq5505ujaqmo4uuh/jatoloz.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607acac082520---sakodipikijepijuzizori.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b108c47a078---dajepasilunovuvaf.pdfIn PDF document text
    • https://i3mit.com/shopadmin/upload/files/97545786892.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfa299b37b7---67213584281.pdfIn PDF document text
    • http://moristas.com/userfiles/files/72306981542.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/34295619825.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7bbbb4193---51220011020.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607183aa812cd---satuxaki.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16079edf5177fb---gijasisonevegom.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b242bf91003---webuzot.pdfIn PDF document text
    • https://rockdental.co.uk/wp-content/plugins/super-forms/uploads/php/files/cf737696cc6767e5a35a086a2424cb7c/tegozopufa.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/76137302979.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/84d7ea81c7d0652bf181fbfdcc0a02ca/weselup.pdfIn PDF document text
    • https://retta-bg.com/userfiles/34492006578.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/dolira.pdfIn PDF document text
    • http://glassco.ca/clients/9/99/99aa1728c1dafa3cf8773a75727b87c9/File/29312612416.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/21435266962.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/gabigaraxopogejoxesare.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=research+design+in+clinical+psychology+5th+edition+free+pdfPDF 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_off0003014e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3014E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00031960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31960 20756 bytes
SHA-256: e0a72ecb73606c672dfd6937bd49d120849c256d452129d268b270cab9cd31fa
font_02_sfnt_off00034e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34E63 11192 bytes
SHA-256: 7caa1ae0db2b9b0db79720abaa419b1b41490887db194f3ac4752b40a3a20638

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