Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee5312027271a6d…

MALICIOUS

PDF

84.5 KB Created: 2021-09-11 08:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 8308e285cdcc6e7e1d2908d2ca3a4d1f SHA-1: d3c73a72f07ea8a19aeeed22f5f4e7ed39246f82 SHA-256: eee5312027271a6d6fdc358fcf826e2df05629cd7d1b9ce9fff92d4d868b49f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier. It contains multiple links to compromised WordPress sites, indicating a link farm designed to host or redirect to malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing operations, likely via spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161313f8d97019---soxonorefukasowirutoli.pdf In PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/00926a53607e20a44781403e0cd6a163/lalosomefuzixatiwitobedum.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/20869765951.pdfIn PDF document text
    • https://www.cascatai.com.br/ckfinder/userfiles/files/36474080229.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/fovisa.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/161304fcfeba0c---wikeb.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/buvofudeji.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/f89d790b9626eb46a996c797e6635bef/vusawututusunefamajel.pdfIn PDF document text
    • https://hijaulumut.com/contents/files/74224774086.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/xurozenerosimasanu.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/kalarumixumesikugabe.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/38752424759.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/gipefafux.pdfIn PDF document text
    • http://floridare.ru/app/webroot/img/uploads/file/365504_pafopukimid.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/db564bb6620ec0fb9bdfedacb5a1ddb7/gibazapimo.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/rijasagigujafosobizopadi.pdfIn PDF document text
    • http://safetruck.gr/images/file/veruxepunorepevojodi.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/mazidajugaxajamososiwo.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/e9a3d4a3046bea71e95cb8f4c3d34c45/jutejifutuvozewezikoba.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161386006220a2---lubifuguvolijemewedipo.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/3879709651.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/vubives.pdfIn PDF document text
    • http://palami.by/images/file/bajuwalupezaba.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302dd94fb14---jomolidipegikofovomuvubij.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/76576487554.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=free+music+and+video+downloader+for+androidPDF 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_off0000e2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B0 10768 bytes
SHA-256: 7a8969ed67e38860d2da2b40ce0a97a2508b11a624644a99d610b5e281060816
font_01_sfnt_off0000fb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB79 18676 bytes
SHA-256: c60730da93d90d23cca614ec247ba721033c836c62489083a674d216a5dc3d8b
font_02_sfnt_off00012ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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