Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f454cf32552b47…

MALICIOUS

PDF

79.1 KB Created: 2021-09-03 06:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 12bf39c5d08e0eaabab6fbf44244fdf4 SHA-1: c5062564c0412dbc9fa143da1f462095dc572ec4 SHA-256: 59f454cf32552b473ec09fe30f73eab3fad248a9ab312430b195990410f8e58a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various websites, some of which appear to be hosted on compromised CMS platforms. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

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 http://ncabhsa.com/clients/875427/File/46708765323.pdf In PDF document text
    • http://younewstoday.com/task/userimages/file/57753570966.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/15ad2ad9fbe364bc7dd5ee59f492b1cb/wavagokivuzisumololezezag.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5408a7470d---zudinuwakerebenubo.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/jiwinof.pdfIn PDF document text
    • http://normel.org/files/upload/file/lofojotimiwep.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/kevasajixu.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/2128d0c23f3f98353c2e8975a416851e/84407643004.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb6d962b4c3---zodupovajuw.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962eae6dc19---34794784253.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/63e130a3f039ae9f47cd0373ebdc452f/84441389359.pdfIn PDF document text
    • http://rheumatology.instituteupload/content/file/69639614324.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/sosofovatisubane.pdfIn PDF document text
    • http://anpo.vn/upload/files/78705120604.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e220a07f5---11575347405.pdfIn PDF document text
    • http://northstarbaptisttyler.com/clients/a/a4/a4b4c2e389351fb2dee96c3f727c6a57/File/biwuzemawum.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/a0f719c92423d69fd5596ec616ac0850/4621371809.pdfIn PDF document text
    • https://dacola.com/upload/files/37537274672.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/78206077917.pdfIn PDF document text
    • http://xn--80aafjbawrcdgsodbdciig4a5v.xn--p1ai/pict/file/52601498531.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/l45j3mq7jas1972f62dbmfj6ge/1120888957.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5d4b3ad413---96251439828.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/161076bf23772a---43862567462.pdfIn PDF document text
    • https://laps.pl/userfiles/file/26740032811.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/guxuranetifibisalizeseb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=esophagitis+diet+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_off0000d2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFE 10512 bytes
SHA-256: 1781ac0f1b4b8e8d37fa92c120cedab780692b959ffc064d4f9451c8b7dcd0a1
font_02_sfnt_off000102de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DE 16928 bytes
SHA-256: 673b856dc7cbde7913d558e1fb26819bfa627ddace4ac794844d857502581c20

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