Malicious PDF — malware analysis report

Static analysis result for SHA-256 350d6245588502aa…

MALICIOUS

PDF

129.1 KB Created: 2021-09-08 21:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 19041299cd9a8dccf54121855b623b22 SHA-1: 92788f13ed725f90cab632c59a3db0dbb2ea453e SHA-256: 350d6245588502aa673d47cd33d676e4441479b8f028ef4da6e6a44ebbc79189
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

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://beiwendq.com/userfiles/file/zoxujobaxevoxasuvigu.pdf In PDF document text
    • http://emailreceptionist.net/userfiles/file/12285378078.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/2331184604.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/puvadalubetaxon.pdfIn PDF document text
    • http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/turatulukukewivefosax.pdfIn PDF document text
    • http://sieuthibds.net/images/files/zeduzumaganun.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/a0k09ujb7mh1p2a2kg68ga3643/korolowuzominuze.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/d41p6nrrmvv2d3rgfvpgkrs0d6/fiderajuwopaxolobef.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/84c2b2bd24a2efb6c0b2a4f3ec7f7a84/tetonoripikuxarijobusuv.pdfIn PDF document text
    • http://www.cottagegrad.ru/files/file/19650217762.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/jogulojixitegetar.pdfIn PDF document text
    • https://olterus.org/contents/files/tozudumejevakogozo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130269215a62---vigosawupuvep.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/18487658157.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/mikebupaxadumudadetilofap.pdfIn PDF document text
    • http://mrybalko.ru/files/widemidizitetigu.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613881a2df862---funomakefagijol.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/28420777640.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16131036f97c2e---42293197654.pdfIn PDF document text
    • https://remini.hu/userfiles/file/10709198883.pdfIn PDF document text
    • https://upaspor.com/resimler/files/96139749433.pdfIn PDF document text
    • https://officialbacknumber.com/editor_up/fifevujigu.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16136203d60dd9---17746091315.pdfIn PDF document text
    • http://ledlight-lamp.com/mingyi/images/userfiles/file/53908169548.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=omnibus+rules+implementing+book+v+of+executive+order+292+pdfPDF 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_off000191d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191D9 18660 bytes
SHA-256: 93fb58e16f3a244df1655f4bbd3f19780aa02dff5ee1fd5845a72c123250d2ab
font_01_sfnt_off0001c2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2AD 11616 bytes
SHA-256: 5ce9f29813babc9e6056261bcfb83e0048282c2cc0f94c563c1b0ac8516dff8f
font_02_sfnt_off0001ddf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DDF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.