Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab8aaabcb2ac5f5…

MALICIOUS

PDF

85.4 KB Created: 2021-09-08 22:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f4f52afd71a0170fd20f4ee70eb9c052 SHA-1: 32bec8ef15e5ea094034a9c8d050cff883d5f5a9 SHA-256: bab8aaabcb2ac5f5ef35d9f441386104c69cd16fd016100d5714f876ff0d9133
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection scheme. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64906328822.pdf In PDF document text
    • http://dlastudenta.org/Upload/file/69510637409.pdfIn PDF document text
    • https://tinhhoaxanh.vn/userfiles/file/19222561913.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/sunodaje.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/kutonurekos.pdfIn PDF document text
    • http://girc.ncue.edu.tw/ckfinder/ckfiles/files/63808226974.pdfIn PDF document text
    • https://dcicz.org/userfiles/file/78831720700.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/46114998806.pdfIn PDF document text
    • http://ping-property.com/user_img/files/fifinojawumopopabafosusow.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/reminu.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/65866859340.pdfIn PDF document text
    • http://yas-center.ru/userfiles/file/bafatuzaselawoz.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1613748fc91e58---94333168605.pdfIn PDF document text
    • https://safe-international.com/userfiles/file/fogiweraxizipiti.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/48390773436.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/ginukakowova.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/zetawitagisawemuda.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/wemanis.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/39622983559.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/36662960620.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/resoxudasiverowezepuxe.pdfIn PDF document text
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/96851035448.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/lalinetizususofisitalav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=countable+and+uncountable+nouns+exercises+upper+intermediate+pdfPDF 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_off0000e17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98F 19052 bytes
SHA-256: 79a664a66ea55566e7a813f8b997fced478ec9ec5296e0b7f5cc9b2ac83306f4
font_02_sfnt_off00012b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6A 11156 bytes
SHA-256: e79e6167556ce78caedf0106b197560a58bd74c9e32cb8e42b7ebbd2642f0889

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