Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2377e053a52b1a…

MALICIOUS

PDF

81.9 KB Created: 2021-09-12 04:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 80f73e97a566c3223de053b52dbfb2d8 SHA-1: 7732e1409aa13d4bf0d002eee624ae1c83aef29c SHA-256: 9e2377e053a52b1a40cef6026bbc205dfaa6debc248043db2e0f85e37a113738
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external URIs, many pointing to PDF files on various domains, suggests a link farm or redirection mechanism designed to lead users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://autosvanbeek.nl/mindcms/js/ckf/userfiles/files/56041812646.pdf In PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/35520629667.pdfIn PDF document text
    • http://alptw.com/images/files/gaxux.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/vomizomumugot.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/fuvokadekozosunasuridur.pdfIn PDF document text
    • http://savemaxint.com/files/file/lexobab.pdfIn PDF document text
    • http://kuryakyn.ru/userfiles/file/19653886718.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/xosipu.pdfIn PDF document text
    • http://sudeoksa.net/userfiles/file/20210902165607.pdfIn PDF document text
    • https://tranhdaquyhn.com/uploads/news_file/jafuwoselerezufizafivaset.pdfIn PDF document text
    • https://elger.cz/fckphotos/file/mikozedijilaziwu.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/difiwixudukav.pdfIn PDF document text
    • http://abnicum.com/files/file/vebibuvijis.pdfIn PDF document text
    • https://hoalavender.net/upload/files/nixopekisewovekida.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/84295534038.pdfIn PDF document text
    • http://stepasidemedical.ie/images/uploads/file/8301517847.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/galovekoromufopatem.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161391e08ebbc6---sotib.pdfIn PDF document text
    • http://garankuccu.com/upload/fckimagesfile/d557a37e9bfbbf41f56a718e0bade303.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/198572d2b6fb22f74cf0aabb479dea38/xifuxumebaz.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/93109604435.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/jolerawesulogati.pdfIn PDF document text
    • http://fishingas.com/userfiles/file/23311943074.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/16524771958.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=american+skin+full+moviePDF 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_off0000dc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC04 17632 bytes
SHA-256: 896d84a1196819ddaee15ec507f5accd27e9ed2f31ae38b7d15c4acc1c1cd04b
font_01_sfnt_off0001096f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096F 10636 bytes
SHA-256: 1d2fdc0f99ba7d887d7cd900053dfbe78796bbbf40d0d5b24fbe6b9e54150516
font_02_sfnt_off000121c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1