Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3e4ef8ced3add2…

MALICIOUS

PDF

77.2 KB Created: 2021-03-09 21:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 01953422317952b02564114a42840aaa SHA-1: 3f731bb982a6009f2b737e9b45cab1bc36876af8 SHA-256: 0b3e4ef8ced3add22aa8808be19f7dbf71e9ac69bd3955b3601c104df810641f
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links pointing to disposable domains, indicative of a link farm or SEO manipulation tactic. ClamAV and ML classifiers strongly flagged this file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/wb?keyword=best%20record%20crate PDF link annotation
    • https://cdn.sqhk.co/sebutarukaw/euGhe0R/kegetifewuxopelepivosasix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418590/normal_5ff361d9bcadb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_6042d69ad7c9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393488/normal_5ffde29ac5f6e.pdfIn PDF document text
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/1921191.pdfIn PDF document text
    • http://operationhomeplate.com/verowetirof13tu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485445/normal_5fcb97006077f.pdfIn PDF document text
    • https://cdn.sqhk.co/vixokezafafu/jiHjhjh/3620636833.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/jcSH8qo/81125531405.pdfIn PDF document text
    • https://xasejudezorakoz.weebly.com/uploads/1/3/0/8/130813307/saduberinomad-basemelekifo.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/ixVhesm/science_lab_safety_quizlet.pdfIn PDF document text
    • https://cdn.sqhk.co/peretudiwi/hejihgg/badass_team_names_for_airsoft.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/susasezolijabuzidiveduboidjq2.pdfIn PDF document text
    • http://kzrovk.xyz/luwexoxajatatha27c.pdfIn PDF document text
    • https://cdn.sqhk.co/purorenutuw/yC6jfhf/vox_cinema_abu_dhabi.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/hic1idW/hacker_definition_english_law.pdfIn PDF document text
    • https://lurekoba.weebly.com/uploads/1/3/4/0/134018443/giruganimadib.pdfIn PDF document text
    • http://idealslimitaly.site/dugoxesojizarurtjh2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://moxutomib.rf.gd/salewotagef.pdfIn PDF document text
    • http://xuwanuxetoto.rf.gd/removable_space_maintainer.pdfIn PDF document text
    • http://wererivukij.epizy.com/mupumawimofupolujudu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69A 4584 bytes
SHA-256: a713ca30a552c72f152d305bc2626f26521849520bd139ca3c20d3014e1d7bea
font_01_sfnt_off0000f633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF633 10208 bytes
SHA-256: 179d41754b10085530c1040b079edd61a7a4b71a69076c830872cdac74ed932b
font_02_sfnt_off00011920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11920 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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