Malicious PDF — malware analysis report

Static analysis result for SHA-256 414dccf89bdc320d…

MALICIOUS

PDF

85.0 KB Created: 2021-09-04 06:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a8ae5765d400dd40f6451b1c538cf493 SHA-1: 64915bc0a51c850c8d12f7f62e20a0946819bb57 SHA-256: 414dccf89bdc320de8ebdcfb311ccaa0563bfa90d7a4a63546afb35e811deffd
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://bungefamily.com/clients/5233/File/62016635308.pdf In PDF document text
    • http://keacg.com/upload/files/50964438098.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/c8617bf629e42634fbddf48c17958313/kuleda.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/65876030250.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/44601227572.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/danus.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bfc110806---mirufezoderuboziki.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/d4f6ebf6833682f7fa290e6c890198c2/nusimolebejumikodalim.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/gujukovilalowen.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/22335002251.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/29483450864.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2d602fcc1---zebafuwekijetelatow.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/fuwepopowibebonon.pdfIn PDF document text
    • http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/54019894440.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/56657754784.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160adc8756dcac---66139638862.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/jakuvet.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/jekutekowefozaru.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/32580031376.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/moduneruwozajivubadu.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610fbe3b130a5---sadozupubigupurap.pdfIn PDF document text
    • http://sddshchb.com/userfiles/file/Fl202108101806346316.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=thomson+dwg874b+user+manualPDF 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_off0000e4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CB 11132 bytes
SHA-256: 56fc55c2d38211d7d10c32aaa9db7cf171c44e87136aa309dac9998579abdab2
font_01_sfnt_off0000fe82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE82 18700 bytes
SHA-256: 500bc49e6d305ea501274cd7a0e5cf9ac5433a85a0f5adae81b64451db6a1de1
font_02_sfnt_off00012e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1