Malicious PDF — malware analysis report

Static analysis result for SHA-256 586ed0168e2c3a09…

MALICIOUS

PDF

82.1 KB Created: 2021-09-17 18:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e61be4c761ad13ad376866d0f9f7dc74 SHA-1: ba7e291ebf327a513c3555912808f0319296da6b SHA-256: 586ed0168e2c3a097d2de0fc4d703ffa4360db36b5e0e1998071bfed19bb8c23
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs that lead to external websites, many of which are structured as link farms for downloading PDF-related software. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://archism.ru/uplcv?utm_term=pdf+maker+apk+download+for+android PDF link annotation
    • https://qigoodteam.com/uploads/files/202109020135019497.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/rowokezer.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/75982191813.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/88679114240.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/92666560684.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/woluvubukobuvave.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/felonafagofugefomufimonu.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/9555666382.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/19400744072.pdfIn PDF document text
    • https://designsdubaiukfashion.com/userfiles/file/pakevekoradobopixo.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/sikikusit.pdfIn PDF document text
    • https://menu2uplus.com/images/file/37791865924.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/keborenejeleganif.pdfIn PDF document text
    • http://sutipatika.hu/userfiles/files/32185104862.pdfIn PDF document text
    • http://grafosaleservice.cz/images/fck_editor/file/rapomaxogenarowuwovanef.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/93a489222059a1faf7a68a480cffd00a/donebabujemozuzawatuzin.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/diwesixovuvir.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/wiwojejo.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/kiwomusazeratadasejulagex.pdfIn PDF document text
    • https://momentous-inst.com/uploads/image/files/62631576346.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/vefilatebiwe.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/17798033193.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/vimilesewul.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_off0000d9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F5 10572 bytes
SHA-256: e5aa5871853fdbb61df034c8e1286ca559a8efde679fe4b336d74a1940a47a15
font_01_sfnt_off0000f20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1D 18432 bytes
SHA-256: 369e85c580e87378f0902259a1567af850422af15c41f2af1bdf9ed66080457c

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