Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab5a2cff6683877…

MALICIOUS

PDF

76.6 KB Created: 2021-09-15 11:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: c5dc568bac9d172bd4a387df8c07ae4b SHA-1: f7a6ca520e0053edfecce598990734d0d525e5c6 SHA-256: dab5a2cff6683877d5f543c202c5eaa9dd3cc413da8a824059e3ce70a5e3c5ef
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=watch+all+my+life+2020+online+free PDF link annotation
    • http://wellogo.in/userfiles/file///42806073558.pdfIn PDF document text
    • https://xetnghiemadndanang.com/upload/userfiles/files/51245890388.pdfIn PDF document text
    • https://classoft.ro/userfiles/file/40381233682.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/rixogogezosokitafin.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-9-5/20210905051548423120.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/xakijozosaku.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/ridav.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/55586382473.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/30446691357.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210910_8825762CEC67ECC3.pdfIn PDF document text
    • http://chafewyuok.handysociality.com/upload/files/wakupivewoduwizubabomi.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/64061960406.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/89388240249.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/78170168604.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/161413931bda49---35698829698.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/202c4224633fb63a787436d0e51e1c22/jopapozalefaloxitexoted.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///xoledorawajolare.pdfIn PDF document text
    • http://sbkf.org/files/files/tasorew.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/jogapatibazijinijuriti.pdfIn PDF document text
    • http://arhive.np-sp.ru/img/file/tatuzere.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/dadifizagosawaz.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/72923129982.pdfIn PDF document text
    • https://ladachess.ru/userfiles/file/62858998332.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/sovatuzolofanituno.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_off0000c76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF85 10784 bytes
SHA-256: a1958f349d2869145790512f3053194d6ebd8c650dafda060794c745c786343d
font_02_sfnt_off0000f83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83D 17100 bytes
SHA-256: 8d7d3f3b920ed0b8b9fa3a6f8448f341befe5a5aee28f247c8fc92b886160862

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