Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e706ad24d909b12…

MALICIOUS

PDF

71.9 KB Created: 2021-09-20 08:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c9188ef4d45552450e94cc01818ffadb SHA-1: 828990a917aecbfccc8d036586b0e887f45906ef SHA-256: 3e706ad24d909b1251f2503932c3c8d1847f0af0c57fde9e9017a746f307add6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to various domains, many of which appear to be link farms or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and the overall structure strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=open+android+app+from+html+link PDF link annotation
    • https://skiclubraonbaccarat.fr/pdf/pevoni.pdfIn PDF document text
    • https://altsovmun.ru/userfiles/file/98702866121.pdfIn PDF document text
    • http://xn--80aer5aza.xn---42-5cdakyymnnb9ake1az.xn--p1ai/ckfinder/userfiles/files/73465893461.pdfIn PDF document text
    • http://thietbiantoanttk.com/uploads/files/1276209071.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/49862806101.pdfIn PDF document text
    • http://ctm.it/userfiles/file/98447302537.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/54121156191.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/vunekolijedunuz.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/10901158867.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48524114888.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/7457062127.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/83885674848.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/bekatifu.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/17426691071.pdfIn PDF document text
    • https://recrut.com/files/files/25948115221.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/f3b851450fc75f99b2fec627582fd812/gusabizarosuvomu.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/lizisexagobudavegiwonize.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1299652d0---miwejub.pdfIn PDF document text
    • https://jin-ji.com/upload/files/vanedorodan.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/94045024618.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/daxepetopukedikosuko.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/difowitupotoxipuj.pdfIn PDF document text
    • https://svltv.in/userfiles/files/42715758443.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_off0000b902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB902 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD119 10712 bytes
SHA-256: 414f94e8cfeb83365f5ffcd5094baf585e43e00b70b23c89bbeb215daf20acdb
font_02_sfnt_off0000e971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE971 15800 bytes
SHA-256: c23122b883cbc2a39b4d435d39633a91bbd67b7f25a7804841c8ff066ad8624e

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