Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b129b1f34992f4…

MALICIOUS

PDF

69.1 KB Created: 2021-09-17 18:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7c635e4f7ca45850a4220d88a6b30ef9 SHA-1: 7fd720dddc8ecbd01c895e3ebd98d39b9d7a653f SHA-256: 82b129b1f34992f4312d729d59bdf15b1b604b98f30da55d8a3e031233a30c95
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to T1059.007 as a likely execution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://simonide.org/userfiles/file/zevazeputifelujoxatifi.pdf In PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/nuxinubulimuk.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/37592731511.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613cbc36b25bc---20658344411.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/joguri.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/4971951047.pdfIn PDF document text
    • https://mkserwis.pl/userfiles/file/79815113983.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210902213722.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/moboxofowimesudab.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/vobud.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/68176808788.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/jojerunoloxuze.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/gisevaworoxuvekududuwive.pdfIn PDF document text
    • http://desiaussies.com/ckeditor/uploads/files/fakalifonuwamibom.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/gexifikoxatobup.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/69260239234.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/foladamakukevidapepo.pdfIn PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/zoxedajakimixatixipobi.pdfIn PDF document text
    • https://ganport.pl/userfiles/file/25731941304.pdfIn PDF document text
    • https://netpage.info/userfiles/file/dijejomixuduliwalixi.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/benume.pdfIn PDF document text
    • https://gestionarival.com/userfiles/file/1495069766.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=turbo+vpn+androidPDF 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_off0000b27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB27B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8D 15080 bytes
SHA-256: 681fb2d6bc2202ca20e8a63f7495e29d67cc673b087fa3b1f27ebb99f1607feb
font_02_sfnt_off0000f099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF099 10208 bytes
SHA-256: 4965c5815ce203c81566941ee68b916200176aaeb4d5ee71caccbe4f64958965

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