Malicious PDF — malware analysis report

Static analysis result for SHA-256 b832407567eaa8e7…

MALICIOUS

PDF

88.7 KB Created: 2021-09-18 02:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b9ee142deba5ed1e17e95316c2a36e43 SHA-1: dea7b896b3e0ebb4d86175649ee31b5d3784167c SHA-256: b832407567eaa8e756de07adac4103f6501757df5e20724832e1454d1182ea58
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM and the numerous unknown URLs suggest a link farm designed to redirect users to potentially malicious sites. ClamAV detection and ML classification further support its malicious nature, likely as a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://yizhu580.com/ckfinder/userfiles/files/lokejavewitiwe.pdf In PDF document text
    • http://dydlhx.com/upfiles/file///2113704983.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/24073525625.pdfIn PDF document text
    • http://scro.ru/pic/file/24408758670.pdfIn PDF document text
    • https://amt-alarmy.pl/userfiles/file/17552277750.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/padaverabevujijef.pdfIn PDF document text
    • http://ore-processing.ru/d/files/62542757009.pdfIn PDF document text
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/16785981892.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/82863199782.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/fesuzudelotoz.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/4571964323.pdfIn PDF document text
    • https://sausalito.com/wysiwygfiles/file/97276392300.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/zefiguvagoxagiribezusi.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/13009222865.pdfIn PDF document text
    • http://beverly.kopanramen.com/uploads/files/8192850765.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130585c3e14e---wudojujipividizarifu.pdfIn PDF document text
    • http://xageunion.com/userfiles/file/37490908364.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/88241848397.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/68061710866.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/bejedilovonexabofaf.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/16257966493.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/a2163d0c9204eeb806a50b2c2182c43b/piwugugotuzezanumunuxepez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=art+of+mediumPDF 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_off0000f6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CA 18644 bytes
SHA-256: 3ed3fc39a99593d043643309bf89f9181c0d70129ce18d4609c4d610a0f9bc6e
font_01_sfnt_off0001275e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F75 10116 bytes
SHA-256: eb3d48a276d21cbcdc809499349518daffd983ebb45a5f714abb785ecd81babd

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