Malicious PDF — malware analysis report

Static analysis result for SHA-256 339124860c463ad7…

MALICIOUS

PDF

66.0 KB Created: 2021-09-12 11:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c0899da0c6cd478385895862252b8f8e SHA-1: 0f3e746a6d5c701eaac73a849229098257ca27e1 SHA-256: 339124860c463ad7cde7632d8914b565831e25f51c0f29397235035fb10a27b2
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the nature of the embedded URLs and the PDF structure points towards exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7151

Heuristics 4

  • 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
  • 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://wastran.ru/uplcv?utm_term=badminton+league+game+online PDF link annotation
    • https://edinburghpools.com/contents/files/12662369126.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/faminunomamazalufibenagu.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/5040442601.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/58815308947.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/zemapibexe.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/72591687402.pdfIn PDF document text
    • http://effektfilm.de/files/file/37993569588.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/82197377995.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/kebiwulomovarifesutureg.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/zosuliwulujigedojek.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/161304c78dc6d8---48051438858.pdfIn PDF document text
    • http://graphicyazd.com/ckfinder/userfiles/files/lijironuvaxasafasapalawap.pdfIn PDF document text
    • http://klaaswester.nl/img/file/9547645110.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/betojetidirudomusujel.pdfIn PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/71378967824.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/lajobozubezitozu.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/21659810749.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161387b470d36e---17287631439.pdfIn PDF document text
    • http://hitmet.slektenkaas.com/bilder/file/siredakamokevi.pdfIn PDF document text
    • http://nenorm.com/files/files/34506123225.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/pelexakavuviwobeluzela.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/14729948539.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/74498055509.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021091202553132.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/xozake.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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