Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6d50748f5d50f6…

MALICIOUS

PDF

87.1 KB Created: 2021-09-05 06:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c249b6b5f91e17462b2acb46cf90f5db SHA-1: be62adda934d1ea1c9c1774fa179c922fa597a82 SHA-256: ec6d50748f5d50f62b3ce309fd1721e9dc63d1b4f928998c90e8b643523494ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious content. The presence of numerous unknown URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e4b6767a660e5b95827bdff264c9b95d/sipeginiziwuxugimedolope.pdf In PDF document text
    • http://abbuffalowings.com/uploads/files/sumedepekuxopomuxolaga.pdfIn PDF document text
    • http://axwelindia.com/uploads/zususepotivivepo.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/koenb2auvsd9h0ke4vgftgkoo5/jizivuwa.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/sufaduripumi.pdfIn PDF document text
    • http://buckleyfamilyofdarling.net/clients/0/01/017bf228c8331327bdfb67b1798bff80/File/98811463173.pdfIn PDF document text
    • https://cargotavio.ru/files/file/68799906697.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d28acef38c---78771049045.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/jupekat.pdfIn PDF document text
    • http://varanini.pl/userfiles/file/bawiv.pdfIn PDF document text
    • http://membranekeyboard.pl/_data/file/28103091096.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160752a7c3843d---dudedimojivozufiteg.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/cd95b91677ae9decc85f4a1477396846/21668517119.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///welitufiwo.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c3091b6b367---39407884624.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/ritamonoz.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/6cf4ea0dc0950fef39d6777c54ffd7ed/83689556128.pdfIn PDF document text
    • http://s-box.biz/upload/datoteke/fotadukuneg.pdfIn PDF document text
    • https://network-italia.com/file/93942973553.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608aac107e6c9---tiziwumofil.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5fc4d3be5---nuxorivovani.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/0k27fl118ckccmbgd48248crc0/59809736600.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/madubodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=into+the+wild+excerpt+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_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10747 10524 bytes
SHA-256: 9f0713e741532ff284504c6cd58bb2dda907a956dbbc29bac493159a55e88d5b
font_02_sfnt_off00011f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F29 18620 bytes
SHA-256: 69ac9f3515630bf543fdd5fc281de48c4695b5e44092f577dc1f366f9557ad1e

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