Malicious PDF — malware analysis report

Static analysis result for SHA-256 469d61b5004d041d…

MALICIOUS

PDF

85.9 KB Created: 2021-09-18 12:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: baaa0ffaa8f1742610388380a5146b94 SHA-1: 63b9909131d3e84b00124502c8b7f53b31f0574e SHA-256: 469d61b5004d041d103c87f06e722752f7c8fbfdfd1f1c675fd8a586067df5be
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable domains and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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
  • 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://drafthe.ru/uplcv?utm_term=mailtrack+for+gmail+android PDF link annotation
    • https://gdwtechnology.com/fckeditor/file/In PDF document text
    • http://kengosushionlineorder.com/uploads/files/34799466926.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/63456816871.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/bodebegifiwu.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/sunosoxabo.pdfIn PDF document text
    • http://przyrodnik-kujawy.eu/userfiles/file/55192735635.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/32072790028.pdfIn PDF document text
    • http://wizclub.net/upload/userfiles/file/maberawarojojijewusagu.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/95916610931.pdfIn PDF document text
    • http://mosjob.ru/images/file/gufopigupuwuligi.pdfIn PDF document text
    • https://nileagriculturalindustries.com/file/jedemozexogozujolupi.pdfIn PDF document text
    • https://csn-alliance.com/data/files/10296381130.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/gumukadexepabafadunexow.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/jufapujomonoxasugazuj.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/pirapusuwulamavun.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/povutebe.pdfIn PDF document text
    • https://ijp2.com/contents/files/sogudeveruvixitadisaseze.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/duvovesigarimutovisifil.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/nokesepexinafuvuk.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/gusedu.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/39814912792.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/sovurusakegokebe.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/23721575201.pdfIn PDF document text
    • https://lapdonline.org/file/todisekiligez.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_off0000e777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE777 10604 bytes
SHA-256: 61846e97ee70998c35b9cef8cb9e642018f67c2933f7ba2cc2f69d16d9b2bb07
font_01_sfnt_off0000ff74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF74 19288 bytes
SHA-256: 2fc25e68e20d8242bc6a5905ef322b89e4c9423a3c52bd6c54a56bfc653f1732
font_02_sfnt_off000131d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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