Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e65bff98ffd9eaa…

MALICIOUS

PDF

68.4 KB Created: 2021-02-25 08:54:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cc9128934ba35df5e5c0c6db1b570c33 SHA-1: eaaad44e0f352c9263f7efc5637aa452749d362b SHA-256: 8e65bff98ffd9eaa33bbdfbbafbf1d9eea45b3a18fc649661ab146ea29bd5369
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://leonvi.ru/strik?utm_term=swingline+heavy+duty+stapler+how+to+replace+staples PDF link annotation
    • http://form-lnstagramverificationbadge.com/intravenous_insulin_infusion_guidelineskkgmn.pdfIn PDF document text
    • http://albatros-trans.ru/delphi_radio_clock_setl2q2s.pdfIn PDF document text
    • http://cethq.xyz/how_to_replace_awning_fabric_on_rvxw4c0.pdfIn PDF document text
    • https://vakevugulipew.weebly.com/uploads/1/3/4/5/134507067/lofosogu_diribum.pdfIn PDF document text
    • https://nipobajomofak.weebly.com/uploads/1/3/4/6/134641158/c8f345c1.pdfIn PDF document text
    • http://qqkaxes.xyz/28736264388hnp0g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390643/normal_5fde4edea0a98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ginowane.onlinewebshop.net/viwuwojorikeropanag.pdfIn PDF document text
    • http://lemazuwijenuxan.rf.gd/how_do_subnetting_work.pdfIn PDF document text
    • http://ribuxuvotamu.rf.gd/application_form_sample.pdfIn PDF document text
    • http://nisakujavo.rf.gd/4354954804.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCED 5692 bytes
SHA-256: 17258bfe43e895693730a17c7c99ad691ff5d3d99eb5641c47a411349230e6b5
font_01_sfnt_off0000e06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06D 10116 bytes
SHA-256: 21ec4d42eb0df02a19b08604fa93fa22383b4599af7cab61c2d15912e5040573

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