Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c186ff9ea00321d…

MALICIOUS

PDF

80.7 KB Created: 2021-08-07 22:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: acd9d95fa4a0e00d5c54f28aca8376b5 SHA-1: 06634ecaa7b6aa5f791e88d7727a9d202d81077c SHA-256: 3c186ff9ea00321dd49b3388e9f966faa9af2cc9e737515a6224be12eb437c05
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=proyecto+de+educaci%C3%B3n+ambiental+para+ni%C3%B1os PDF link annotation
    • http://er-trans.com/img/produkty/files/xavesitiwuzimubawufes.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/dofaf.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/vupawafezemekanuvef.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/32436361609.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/14278678502.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/132e10a7de469f740e148b1f66288aea/fujap.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/45720548481.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751e67d1bd5---mokekisusepirevizunorize.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents//files/xaranulezapebexebaw.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///pogutokitevax.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a33129c1332---81089061000.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/4lp2dq09aa5djftl6k0qvq5ahr/powekafofubiza.pdfIn PDF document text
    • http://soul-program.com/clients/e/e8/e84723a0d254fbc5507aaa4bd1967541/File/mavaxutitafowosinepapiwux.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792d0664f3a---zasitapodudalavezenumup.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077867fa10a1---fadobesaxujifizevi.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5a2a2effe---15973173819.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/64819639718.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/296b73f8ffb0722860dc7a23afabbe1b/galet.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/19088132812.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/duwimiba.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210726144106.pdfIn PDF document text
    • http://hzqzg.com/d/files/tutarulixibuwuripatovuwe.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_off0000d3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB6 17636 bytes
SHA-256: b6b3bfa967705d43b0de6947d34d92cd3926e43b0204f5642679233aff2f2c60
font_02_sfnt_off00011836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11836 11372 bytes
SHA-256: df1f6341d53935d9708064808aad850b645fd8da487ffb75e06048a6cfc9e2c1

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