Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dccef018e5aea57…

MALICIOUS

PDF

72.8 KB Created: 2021-09-09 09:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 729e8157642c7c0574acb8ae0b9a0db8 SHA-1: 7fc4f080b07f4f20615113c4b1cd535081892e03 SHA-256: 3dccef018e5aea573f5c00ec933cbd3db859e4842294a4c90e77c57851b6f376
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://www.tecs4.com/intranet/ckfinder/userfiles/files/32323104544.pdf In PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210908/file/16310532209704.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/sisawabexazalijexawaxubu.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/53394898285.pdfIn PDF document text
    • http://youzedu.com/ckimages/files/20210902055115621658.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/zilaxeberovof.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/68552913634.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/71434554759.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/44598511519.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/54664657871.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/zutivunama.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/jabuvimogexagi.pdfIn PDF document text
    • http://pi-consulting.ch/download/sutuvurinazirose.pdfIn PDF document text
    • https://bike-accessories.supersites.gr/content/ckfinder/files/gobelezawijujavisuturapa.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/bowuxul.pdfIn PDF document text
    • https://mimpishiodua.com/contents/files/95240295741.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/87357207762.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/59895551947.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/68275420904.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/gunonaru.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/bulipazasejevimevupuz.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/doxowat.pdfIn PDF document text
    • http://investbuild.ru/var/upload/file/29034844653.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=love+and+like+difference+quotesPDF 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_off0000bba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA3 15896 bytes
SHA-256: cac1a303e5e6ba559f61f63b2712cce42f92c38c94a69d07b3fdb386bf3f22ea
font_01_sfnt_off0000e453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE453 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6A 10828 bytes
SHA-256: 5c98eddfab7356c588c8018081e9d0d0ef917a6a7ecfa68dcf1d7176a916b14c

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