Malicious PDF — malware analysis report

Static analysis result for SHA-256 b55ed1c9af7abec0…

MALICIOUS

PDF

90.7 KB Created: 2021-09-17 18:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a48dc4846a2a9d4fc9446e6dc1fef87f SHA-1: 2a9d88861d312ea25a398b92ae71196b1bf8c728 SHA-256: b55ed1c9af7abec040b20dbd9451441b504db00ebad411b637bd6f856b4d7d06
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external domains, suggesting it's used to redirect users to potentially harmful content. The PDF structure and the presence of external URIs strongly suggest a phishing or malware distribution vector, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://philabc.ru/uplcv?utm_term=zvizdan+full+movie+online PDF link annotation
    • https://xtrafitcoaching.com/www/images/files/domoxomudu.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/31366471510.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/wowegifok.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/tizobodetewowoxedu.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210909_185019.pdfIn PDF document text
    • https://varida-tech.com/ckfinder/userfiles/files/47226519323.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/tiwupubirovapufixovubilof.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/fapevakutanov.pdfIn PDF document text
    • https://kenhquangcao.vn/uploads/files/89082223377.pdfIn PDF document text
    • http://hanahana.vn/media/ftp/file/laxadodidamo.pdfIn PDF document text
    • http://c2r.su/uploadfiles/file/2021090402011073499.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/87549518129.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/mired.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/85281098583.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/tekuzimitapexibowaxavepez.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/forulixaximepuxuman.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1631582998.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/jirimezogoju.pdfIn PDF document text
    • https://sabunwangi.com/contents/files/2407624613.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/96129594774.pdfIn PDF document text
    • http://enricobarraco.com/files/74010724973.pdfIn PDF document text
    • https://quatden.vn/webroot/img/files/nuvuzuzufuvelumuzovafef.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136f230d601f---joxabegakaj.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/22097401568.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_off00010139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10139 10336 bytes
SHA-256: 3a4c8d787b4eae52165a83469544b49b873ffd757d55fa000cdb57cf9dca2c70
font_01_sfnt_off00011883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11883 17264 bytes
SHA-256: a2bc0ebe392a440865398c71e9e5717eb9b54b1e1f86dd0fd5ed15d896e92952
font_02_sfnt_off00014566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14566 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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