Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ade6e4f4f698f8…

MALICIOUS

PDF

232.4 KB Created: 2021-06-30 02:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3d509c8912f0d51691aa5e05d78d93fb SHA-1: 7a8fc19b25576b22d70a99f70396461994af28f9 SHA-256: 17ade6e4f4f698f89265b2c19e08b271aa816c01257aeb72fc21e74809b4078d
126 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The file contains numerous links pointing to compromised WordPress upload storage, suggesting it's part of a phishing campaign or a distribution point for further malware. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772a7dbf9e4---serufuwuvazifajegu.pdf In PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/figojuwuw.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850248632b2---58796735187.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fec5b5f867---7022989980.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/lp9bohk89ngmf3h4460j9ktihf/xiwukiremelaf.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076866d037c4---21123966913.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/regisogopakugewikam.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/gerekulokat.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/2bcee8211635d56a68391bdf0d6a9718/xivubakisef.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a928a5b5192---zaxig.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/8d0f24e93c47b2fa2a25b94569dd0c84/78988724997.pdfIn PDF document text
    • http://wawa757.com/uploads/files/domotuvemijerewebepoputaf.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/12911722175.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/617128093.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080dc398142a---45754890357.pdfIn PDF document text
    • http://szrealty.net/uploadpic/2021-5/file/2021051008320073499.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/94376004127.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/6662982076.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/zowukuneporadekoleribimo.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/5ed817a1f969ee627004945fc9e4a057/23011223486.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/jepamejotovuruw.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/d78c457d4106d7420c75f3ccd6be0183/15845201029.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/vuremutipolo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=mathematics+for+economic+analysis+by+sydsaeter+hammond+solutionsPDF 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_off00031fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31FC5 11088 bytes
SHA-256: efff1bb7873e1af6b2c36c8a28a9685eb7163e9746bd785b9885a59c72183f0e
font_01_sfnt_off00033976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33976 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00035188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35188 23844 bytes
SHA-256: 06704ce22dd80c693080ac7a936a2f673dcd32ccbdde0536a55d9c759927992e