Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b14c8b6a76f481…

MALICIOUS

PDF

95.8 KB Created: 2021-07-01 19:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 769478df81488643c734a388122e8eb6 SHA-1: 7d6ab8bec80990e155a4ad27bd50d24e5145e507 SHA-256: 04b14c8b6a76f481fc94198e01030c06d5be919c9ce3684ab3f2ed5943765602
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many URLs pointing to compromised CMS upload directories or disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://www.mearesandassociatesllc.com/siteuploads/editorimg/file/2256693757.pdf In PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910d8eeaf1b---86804772711.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/08bfc0uqtggfbucfqbmvqddn3n/27037578632.pdfIn PDF document text
    • http://project-st.ru/userfiles/file/71302192070.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e3167207d---panujefepajimexim.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/vugaxoxijox.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7691b28f---biraxaregonof.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/063e8ee9e4218c7cf56e5ce91ef01b99/vakofez.pdfIn PDF document text
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/watisoxolitilovo.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/25dcf8e691c42ba24ecaa1e7f9673142/fipibizotapotu.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7c15f41e1---pibulokerajo.pdfIn PDF document text
    • https://xn--arbeitskndigungsrecht-best-5zc.de/userfiles/file/jowadavafozerenukumezoza.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/24949975547.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607061f0c663b---10121476018.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f371a30fd2---sulobuzezopazatewoneworo.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/40211973053.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/wizit.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16087bb6a81ec2---simokixipifudas.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/kixupararamoboroni.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607882a0dcd2d---jogebopanisuzad.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/134c6cecf8da22cb1a95e4fdfd16e65d/suseraxobagalikanep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=buddha+quotes+on+negative+thoughtsPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/f8ce6682987be66111f4bf51df92b5d1/79990738021.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_off00011648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11648 16984 bytes
SHA-256: d2707e7b8dfb9f6da6fc5e29181aef3856f3048315a729daff931211c2fb51ce
font_01_sfnt_off000141dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141DC 10748 bytes
SHA-256: cae1cd8155efa9cc93d2a0ce5e8ef0f8df621a870cc2ef1f717c29f3794a7c56
font_02_sfnt_off00015a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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