Malicious PDF — malware analysis report

Static analysis result for SHA-256 466bba791123ab0d…

MALICIOUS

PDF

81.6 KB Created: 2021-09-14 05:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 11e36246f61935022bdf944a3fadb3b5 SHA-1: c7124f9a4975937145b5fc9c8b006efdb30bb5d0 SHA-256: 466bba791123ab0d3e1691c9bf960659169110e8b09d8a809edff6939954dc8e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple external websites, many of which are hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://eol.org.pe/ckfinder/userfiles/files/manusofufudiwutegelefiv.pdf In PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/91090542240.pdfIn PDF document text
    • http://zl369.net/userfiles/file/58091360563.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/36267107999.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/68098226286.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/dijoruvanomarevew.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b12c3e49bb---89710209818.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/faradepigudizalanen.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/95402098322.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/pexuxewoxenutekez.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/70319210574.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/bulepifovenaru.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/mepilogexote.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16134981608e31---34870690492.pdfIn PDF document text
    • http://unstitchedfootwear.net/files/file/firixovapirowavomi.pdfIn PDF document text
    • https://csn-alliance.com/data/files/96576745125.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/gexosuradepasu.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/69958918922.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/78023907066.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/39d7432dbe420f5ca07038ff8f093b65/pitetap.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/74706258926.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/40017371720.pdfIn PDF document text
    • https://qigoodteam.com/uploads/files/202109020135019497.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+free+up+space+on+android+tabletPDF 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_off0000d8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D8 10928 bytes
SHA-256: f872ae1bce61b4c8e7e2ed15be807d4f0d06c2c6a104b73c74f8b0e002e00e86
font_01_sfnt_off0000f214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF214 18060 bytes
SHA-256: 403ff165b6653708f111cfe1620bd22c0c54b03c1afe4b4e4655b01630ad8715
font_02_sfnt_off000120b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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