Malicious PDF — malware analysis report

Static analysis result for SHA-256 630bd5f466173f2a…

MALICIOUS

PDF

76.3 KB Created: 2021-09-04 09:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 812fc3ebb74a4fa0d2a212c3b01edb6d SHA-1: 3bc7e343e94881c6a274362d7439b48e1afa4778 SHA-256: 630bd5f466173f2aa5a4155634ced3823a83cf151e1e03ec87b55ad15905f1c6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The presence of these links indicates an attempt to direct users to potentially harmful external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 6

  • 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.
  • 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://monamifrance.com/FileData/ckfinder/files/20210617_9D5539879F117E13.pdf In PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/60bd8ffefdaf88de52ddba5bc4593d48/15622976136.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/6842063576.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/25a4qjjne233taigtgijeeomh1/mesovosutowimeworuka.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd688bd174---66565824339.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/jisawedotugojomisak.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0d83c8d99c228e5d1b2ecd75a3d2614d/14258442225.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/zirafet.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733db4b9852---finumagufakakuket.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/425ad977c3c6efe0f4a4bb13b42f2745/81408245684.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b94101435b74fa5c0cfd2099945a3498/83298560120.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088bee270dbb---68139036308.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/78307444254.pdfIn PDF document text
    • https://webmenuplus.com/images/file/91745906646.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc25314dd0---dezasi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c5ea5c41c0---44983325980.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/3126433591.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/76975213931.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090ab839b32e---kusijigajodiwixevajovovi.pdfIn PDF document text
    • http://iqlacpro.vn/emotive/upload/files/weweg.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/zurovazomudobivivakapek.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210707_E490F9720A4B53E3.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/d61fb09a9bb9425aeaa66b2c8712e798/jabupovubigul.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/migogopur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=macros+in+excel+2007+tutorial+pdf+free+downloadPDF link annotation
    • https://mediaget.com/userfiles/files/68578231010.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_off0000c4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D3 11188 bytes
SHA-256: 814110059bda548798c9bcf3a0d6b1f24e8de6ce13c45ce8c77b6eafcd93fb64
font_01_sfnt_off0000df3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3D 17660 bytes
SHA-256: 37cc1879600e5701638d3bd449734628fda60320e0dfd1890611a585db919c8f
font_02_sfnt_off00010ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1