Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd276f62ac5071f…

MALICIOUS

PDF

72.9 KB Created: 2021-02-19 22:45:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: fabb331b429662598a7d1e0a1ea193bc SHA-1: b68a75ce5bb386e1fb9fe5a233709ffb3f5db16d SHA-256: 0fd276f62ac5071f9e729cb3790e9e04fc1d3f81381df7daa331969513310685
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF is designed to host many links on potentially untrusted hosting. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/strik?utm_term=john+deere+lawn+tractors+cost PDF link annotation
    • http://ca-management.website/tri_fold_brochure_template_publisher_2016w2v4o.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/zhg5Xih/safari_browser_for_windows_2020.pdfIn PDF document text
    • http://sarhello.online/jumonus97u60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408340/normal_602d5681aab8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447276/normal_5fe291faf1b67.pdfIn PDF document text
    • http://itravelgr.com/tipos_de_descripcion_literaria5uora.pdfIn PDF document text
    • http://folokuvatajaweg.22web.org/bixby_briefing_alarm_android_pie.pdfIn PDF document text
    • http://lumurezekosarew.66ghz.com/genealogy_tree_template_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/lokalofobox/iSAXjha/38754562796.pdfIn PDF document text
    • http://gramnews.xyz/32788402930nhl9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403118/normal_5fd27a3798d91.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/Rje6iaV/top_100_songs_of_the_80s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409813/normal_5ff4b79ec3a6f.pdfIn PDF document text
    • http://brumbum6.xyz/expanding_triple_brackets_answersngnn8.pdfIn PDF document text
    • http://vabetovopux.66ghz.com/abrahaminte_santhathikal_malayalam_film_songs.pdfIn PDF document text
    • http://allfreebets.ru/h81m-p33_v2_manualc7hvo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xurixado/winirirevejew.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/novipidetapoxubipuxawusa.pdfIn PDF document text
    • http://jutejuviwolopis.rf.gd/50249068647.pdfIn PDF document text
    • http://tifilumiteva.epizy.com/7_continents_and_oceans_map.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/waxobubegujemimunixoxipon.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_off0000dfb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB1 5108 bytes
SHA-256: b9a9db0df74e74ed5d3948a2a30eaaef9e91070bfa149610bd05452769929ca7
font_01_sfnt_off0000f11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11A 10896 bytes
SHA-256: 93d3f9dab4875f14dd8f360ad6cb2b9642d8a47b605da4fc8d72bc126dad9a02

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