Malicious PDF — malware analysis report

Static analysis result for SHA-256 8780ebbafb9c6500…

MALICIOUS

PDF

88.7 KB Created: 2021-09-01 13:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 98ec2380fc6ab2ddf8c46b630773a222 SHA-1: 8055d247f02898a7fb8c4a114e8f7c2773231875 SHA-256: 8780ebbafb9c6500a948f33a3e9225b5e597bfa3ba869e608d727c02eee81d30
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other domains. These links likely lead to phishing pages or serve as downloaders for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://crewmak.ru/uplcv?utm_term=native+american+use+of+sage PDF link annotation
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fa2af37fb---pilixesupotopopivadat.pdfIn PDF document text
    • http://contentworks.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4bcf492c3---watirarebisuzekezonemosif.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/161078be5b5912---ragidedoguterofomanunari.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/77399377617.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210709220652_sg5anv.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/31292458897.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/d29ohur8uvibcfl1ri0cmen1fk/nupax.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/pepuzatovibeji.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/tiximajununab.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/ca7dba7e1643df1c15648bd6eee290f8/1552063940.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/baxunipowukopuzezenur.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/nevepiz.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/85172583786.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d9bfbc53368---vavatomenonidowa.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606f88e93ece5---woram.pdfIn PDF document text
    • http://xinyuemu.net/assets/202108/files/20210801173748370301.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/76475057941.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a502a7a9fb3---89476286588.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/56321604343.pdfIn PDF document text
    • http://joeun-it.com/userData/board/file/14878733311.pdfIn PDF document text
    • http://radiofarsasch.online/upload/files/vesegobo.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/43889685863.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/tavosanesifo.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_off0000f43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43B 18648 bytes
SHA-256: aba995310f39010eeae86e60f6b7d3435eb7ef5d0a87eb6063a80fcc6e410842
font_01_sfnt_off00012494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12494 10776 bytes
SHA-256: 564f5cb65d10f89241b9569aa34f973505915aabca1ef3e04e13e98a2a366a10
font_02_sfnt_off00013d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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