Malicious PDF — malware analysis report

Static analysis result for SHA-256 772a3b71b870480b…

MALICIOUS

PDF

84.9 KB Created: 2021-09-08 21:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2e85a0e5e2525d6a576b539c60de29d2 SHA-1: 9a36342634371c8511ddb2c1e8ad71194d2d21ab SHA-256: 772a3b71b870480b8524959e591d44e8aff0fbcd8c6d38639b2947e1c4f619d3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs pointing to disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites, which are designed to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=android+format+usb+fat32 PDF link annotation
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/xadop.pdfIn PDF document text
    • http://namkhoabacninh.com/images/files/76349076020.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/fomifupi.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/13456280990.pdfIn PDF document text
    • http://ipllaser.in/uploads/47508831198.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/69545780259.pdfIn PDF document text
    • http://texmet.pl/userimages/file/20108513239.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/nomawor.pdfIn PDF document text
    • https://nocnepal.org.np/ckfinder/userfiles/files/9269333378.pdfIn PDF document text
    • https://venus-forever.com/image/files/tegexogafibome.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/93080370964.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/fogugu.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202109010635417285.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/jugobegaj.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/kotulekurowetefeg.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/86831161804.pdfIn PDF document text
    • https://artgreen.vn/attachment/files/kuzavonunanifexoked.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/mudugubimetuxekiwo.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/49050454876.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ef6c1decb---89563988997.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/mcrhn1s94ugi1631bh15d0vom5/10829540855.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/mitoliribu.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_off0000e51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51C 10848 bytes
SHA-256: 68dbc36ad7d5f7173d09c709f56a9a115859611ba7cd452a8448c119403bf127
font_01_sfnt_off0000fe34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE34 18332 bytes
SHA-256: a9ff064d598da2633d248d565baab10dcb22a7c2eef437072b6d9c7e6fe58d18
font_02_sfnt_off00012e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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