Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96ebbd3d5617187…

MALICIOUS

PDF

76.4 KB Created: 2021-08-26 19:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6793313f5f4861a7804453fd85ece7cd SHA-1: f66c1ebca10092b073f0105d6bfd7ba0d837d8b1 SHA-256: e96ebbd3d5617187c29a69886019c6f968638097219ab6469747d0465b782d16
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://synerhu.ru/uplcv?utm_term=definition+for+eminent PDF link annotation
    • http://ghioroiu.ro/sites/default/files/file/rewemujogitowelisil.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b96cef6e04b---xanimosikame.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/5376423506.pdfIn PDF document text
    • https://windsbs.biz/files/file/jugugedigafoloseperul.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/jepiposimibibotusesoraso.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f0f5bf0d2---80962037570.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ec42510e6---jawekamatonatas.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/xupemizefetokuregi.pdfIn PDF document text
    • http://hubbardfamilycircle.com/clients/62940/File/88740491431.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86deb90d84---55692516577.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/a22459de2ac67aea19337b007794cc76/53843468703.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/xutem.pdfIn PDF document text
    • https://fratellifurloni.it/file/nizirufilagakej.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16077227ced00f---wivajajexakujodek.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/wisej.pdfIn PDF document text
    • https://lombardpruszkow.pl/local/userfiles/file/24306705030.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/35616582419.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/13377229335.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/vubavakuji.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/fonese.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/errs9ipkjmkucg5880ojft4ek3/52023396874.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/tdh0e2rasjfideifo9vdddvc71/zikipo.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1053874336609472685bf0a.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_off0000ca9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9A 16400 bytes
SHA-256: 07d194786fbbfc56cacb53fb8d9ef3bd3c0c57e5df2fa1f37efb3570a4c920f4
font_01_sfnt_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 10000 bytes
SHA-256: 3755a4fb527cc4432cd837791cd163cfc43f0fdc85e3dce02c8b104cbda920f2
font_02_sfnt_off00010aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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