Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7c627f4382cf28…

MALICIOUS

PDF

70.6 KB Created: 2021-10-05 12:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 221043b12e91fadadad2ea8c38d1a44d SHA-1: d17cf51b18bfa0bbbd9a9a0a784550f01b205d04 SHA-256: 0e7c627f4382cf2859b9e6d7dfc1bcf74acd8551c5b333a0a4e567b076063af7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6693

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.truckersplantparts.co.uk/ckfinder/userfiles/files/84223924272.pdf In PDF document text
    • https://legend-chang.com/UserFiles/files/74089601632.pdfIn PDF document text
    • http://ydchem.cn/filespath/files/20211002205806.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614c80d18b87f---26991030862.pdfIn PDF document text
    • https://tuinvandecruys.be/file/timobiterevepewulolod.pdfIn PDF document text
    • https://www.poole.ed.jp/system/ckfinder/userfiles/files/wetut.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/jukenomijesopavam.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/2086421346.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/bawidazakadunanigisukumov.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/74820815796.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/35530409418.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/muvimasete.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/55830084055.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/2224096690.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/36345057768.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/suguzizumugebibomebusumon.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/51266122482.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/nopepixirasatinusawewub.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/runoroneduzujuwo.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/fapafozexubuviw.pdfIn PDF document text
    • http://nyt.jp/p_images/resource_library/file/47895503740.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/84707885377.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=polite+follow+up+email+reminderPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/57e11c6205ba767c55edd5ef55fa688c/80129224472.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_off0000dcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBF 10676 bytes
SHA-256: e60fb94fff9ad2ea552fb6ccea3b8c63504b93417ff4db7a2c1e991691dc9484

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