Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f452038dae95676…

MALICIOUS

PDF

84.0 KB Created: 2021-09-06 19:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e3e5670a99fb8c4b36baf8ba95541c5b SHA-1: c4c5ae8df87a56138af619cbbfe3b1fb535f656e SHA-256: 5f452038dae9567631cf720bf019c7175875d1a7a85bdb15cd0d91f0ff3d708b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a243c8a69f6---80252799070.pdf In PDF document text
    • http://krikrik.ru/uploads/ckfinder/files/difepovudaju.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/81784823073.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/q1p49rl0309rirehfgf7q3k0s7/75768788784.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081809c7b850---wetiwolimife.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/24060016782.pdfIn PDF document text
    • http://juentai.com/userfiles/files/jiwegi.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/161285443d0dd5---64674454426.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087a19962f74---34721539539.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/4oi85b3f48htk2qjj2pit5k6k0/juvogenopikadeninepo.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/4718260788.pdfIn PDF document text
    • http://gialtour.it/themes/userfiles//files/pujesemim.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27a960aa55---vonanenuxetajodelaxu.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/61035675231.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c54e219d3---gojetaf.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/30712818495.pdfIn PDF document text
    • http://gyobel.it/public/file/fonovanaj.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/zonunigewigojazabodumeg.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/nisosimejagamak.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c311389965a---7227012594.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/8518b403706e9911d6663e526d60fd07/solugabasopi.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/9e005a80c2cd3a6ac76edeaef2eae4ea/25335065827.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/66294977795.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/lefarasabifapataxinisi.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b1dd19f1c---77329412632.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=pdf+to+image+converter+portablePDF 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_off0000e57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57F 16824 bytes
SHA-256: 2bf8387fb8feffaa11289f0aab0d59b89b0adb7d6980f0d3d6a68828a7d0db27
font_01_sfnt_off00011104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11104 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001291b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291B 11000 bytes
SHA-256: 0d5c2114025f5054c941e195f38aecf57c8f4826287d853d101b359b83dfb5b1