Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed38267ffbd1cf7…

MALICIOUS

PDF

72.8 KB Created: 2021-09-13 00:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2bc60a9cfac50520ad35ec27ed45278a SHA-1: edc4aa3fbd0016983af2a5271ab5bfa87d3ec78b SHA-256: eed38267ffbd1cf7fcbd79d5c593d44f0f36fc58480cd9740cb696006ff9fc53
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs pointing to disposable hosting, indicative of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript (T1059.007) suggests it may be used to facilitate the redirection or download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://catamma.ru/uplcv?utm_term=is+mobdro+free+to+use PDF link annotation
    • https://fceresources.com/ckfinder/userfiles/files/96344701174.pdfIn PDF document text
    • http://upakuika.com/img/file/55795110749.pdfIn PDF document text
    • https://eko-briketes.lv/userfiles/files/sabofoku.pdfIn PDF document text
    • http://dison.cn/filespath/files/20210909065734.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/41376437886.pdfIn PDF document text
    • http://warwick-ems.org/userfiles/file/pufinadi.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/wajed.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/78222550738.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/97b8c10b1d6a26bc60590a9403c0f6f1/damir.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/kabuxisufozimolizidekawo.pdfIn PDF document text
    • http://garderoba.sk/images/_file/10823073144.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/wimetajojofidunimetinike.pdfIn PDF document text
    • http://rockycheng.com/ckfinder/userfiles/files/gukilewadawugovadiv.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/77353194000.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/95570622661.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bolivifimigi.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/melutigutokexeradijabe.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/c303800e15841a0c229b67b2c6c16e04/sumuzebe.pdfIn PDF document text
    • https://seas2010.cienciaevida.pt/site/upload/file/47879014147.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/d417468ac757567bcb84d2aa052c5761/48357518474.pdfIn PDF document text
    • https://www.barefoothoa.com/webroot/js/ckfinder/userfiles/files/50565583028.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/tamikutepe.pdfIn PDF document text
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/mibepetapewafiti.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_off0000bb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB2A 16836 bytes
SHA-256: 664d5a2bde41eabdada7895ac98ea3f3bd2e079de5ad527e1e0d8c616cfc032c
font_01_sfnt_off0000e69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69A 10300 bytes
SHA-256: f9cd4ecf5985bfd80e30ad8ff9baa73133e2c05a2be00517e4979da5f60dd64a
font_02_sfnt_off0000fdda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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