Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0e1fcdccbf4477…

MALICIOUS

PDF

75.7 KB Created: 2021-09-18 07:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9172a43c11765e8c2efc643b3be7a896 SHA-1: 8c05e4e5fb38f38e0690623a16634cab3728e9e3 SHA-256: ed0e1fcdccbf4477355af6efef43fc0e7ed4004f71d4aef2ed1de58d3feca75e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, with high confidence. It contains embedded JavaScript and numerous external URIs, many pointing to suspicious domains, suggesting it's designed to redirect users to a link farm. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of hosting multiple PDFs on disposable domains, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://saikekanglun.com/filespath/files/20210912031444.pdf In PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f327f8d033---43256720197.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cdbb583ae2---demopirexi.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/fegulajururosu.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/satofip.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/10830901700.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021912128589555.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/fonanotisusijulegugafeka.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/45815889150.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/vokigo.pdfIn PDF document text
    • https://florissantdesign.nl/docs/Image/file/fekapaju.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/nusemozomo.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/5103683040.pdfIn PDF document text
    • http://waxiangyuan.com/upload_fck/file/2021-9-3/20210903050108797464.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/vulevobuzawisuzijad.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/mimipopajivitubapajisebus.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/fedilolizizovugojavatu.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/ditonitepinilarikil.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/salabiwifekuzele.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/55963163375.pdfIn PDF document text
    • http://tehla.eu/userfiles/file/33186228242.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=afan+oromo+to+amharic+translation+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_off0000bfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC5 18716 bytes
SHA-256: eac013908d3d70bdc4a85b6561445fb81f94f3f405cf5fdba9aadba27736fe23
font_01_sfnt_off0000f0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B7 10732 bytes
SHA-256: 1c7081df54d3f31ff3642e476e5fb1f61cae6754a4fef0e2f5190606d04f6619
font_02_sfnt_off0001092c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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