Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d293d29bf7029ee…

MALICIOUS

PDF

77.2 KB Created: 2021-09-12 19:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 801f68897920f9e421c071882b5f726f SHA-1: 9aef1912c454e40f67beebdf02558243fe1d8593 SHA-256: 0d293d29bf7029ee877b8ba145a72a393d571613ae2ed174d4291839d60a6dc5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, with a significant heuristic identifying it as a link farm on disposable hosting. The primary purpose appears to be directing users to a collection of other PDFs hosted on various domains, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 5

  • 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
  • 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://parklanehotel.asia/userfiles/file/vowinugunorowazezevafezo.pdf In PDF document text
    • http://uticachemical.com/files/upload/files/rusepebugulagexenodul.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/xexiverufuvagogetogelukuz.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/55233994805.pdfIn PDF document text
    • https://tekdalyapi.com/upload/ckfinder/files/gibejipusexowejusajesofal.pdfIn PDF document text
    • http://redskap.ru/userfiles/file/pegozufa.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/pejileximedopumapi.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/23560484848.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/62140796348.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/ronuwuwevetiduturidove.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/detijobapopapirinomej.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/fupafuxi.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/161358684140ee---gatosodogolexodusidofidob.pdfIn PDF document text
    • http://fmdscu.net/userfiles/file/54917096243.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/73095795252.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/34467841726.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/rimup.pdfIn PDF document text
    • https://seedcambodia.org/htdocs/cljr/data/files/5934837205.pdfIn PDF document text
    • http://thy-environment.com/userfiles/files/muvagigogekumesogu.pdfIn PDF document text
    • http://telektrans.hu/editor_up/zutogozezebonelabum.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/74015987156.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/59025973066.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/78292123903.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/36726044224.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=rome+total+war+iphone+cheatsPDF link annotation
    • 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_off0000c99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99E 10768 bytes
SHA-256: 003f6c0e51ac4c173d6348a3b9dc67714033957ea9f47dadb58f4dbf892491b6
font_01_sfnt_off0000e241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE241 17512 bytes
SHA-256: 57fa29360e37ddcf5c05c595a7293ed0221c8444efcb3f724ecdeee5debe9018
font_02_sfnt_off00010f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1