Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef9691a0ac1f6508…

MALICIOUS

PDF

84.5 KB Created: 2021-03-25 03:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fc1f6aee161ff280846aea411644e309 SHA-1: 7712f0bd71cd46d2cf0e763170c6706a124a1495 SHA-256: ef9691a0ac1f6508bfd8357eb637af6c4601d5e2831fb8da461d01e1dd4c657a
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number hosted on disposable domains, indicating a link farm or phishing lure. ClamAV and ML classifiers identified the file as malicious, specifically a phishing trojan. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest the intent is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/123?utm_term=carrying+capacity+graph+worksheet PDF link annotation
    • https://cdn.sqhk.co/jagejope/Pibjadb/anarchy_reigns_xbox_360.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/reino_plantae_definicion.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/saxophone_repair_kit_alto.pdfIn PDF document text
    • https://xujopikaxatanow.weebly.com/uploads/1/3/4/8/134850499/8142156.pdfIn PDF document text
    • http://majedox.iblogger.org/factors_affecting_slope_stability.pdfIn PDF document text
    • http://tizisewe.22web.org/how_to_change_the_data_labels_to_display_only_the_percentage_in_excel.pdfIn PDF document text
    • http://idealica-official-it.website/36647980046utxoe.pdfIn PDF document text
    • https://cdn.sqhk.co/lojegalivo/Xjh0Erm/30961144991.pdfIn PDF document text
    • http://sotipidikukunow.getenjoyment.net/algorithm_and_data_structure_tutorial.pdfIn PDF document text
    • http://feporerapupanun.iblogger.org/zuzufe.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/umghLkH/miwutewafofufewumusatakus.pdfIn PDF document text
    • http://wilitubejibo.iblogger.org/labowazetiwojuje.pdfIn PDF document text
    • https://sovejugi.weebly.com/uploads/1/3/4/6/134652237/wanujof.pdfIn PDF document text
    • http://tarusexozof.iblogger.org/kojajeledisa.pdfIn PDF document text
    • http://mexicotop3.xyz/ksp_1._8zxy8a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bumojito.rf.gd/gebiromalikipag.pdfIn PDF document text
    • http://tolokob.rf.gd/lawizisom.pdfIn PDF document text
    • http://xoxemofunox.epizy.com/printable_symmetry_worksheets_for_grade_2.pdfIn PDF document text
    • http://meralilenizo.epizy.com/colorado_springs_police_department_report_accident.pdfIn PDF document text
    • http://bagugexasorip.myartsonline.com/dunufodime.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDA 5324 bytes
SHA-256: 8440c2a399e4c29da76725199a956fe17d1e781181323f751e034631e0d3dae6
font_01_sfnt_off00011f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0F 11044 bytes
SHA-256: 73f07723ca5c2ac7998dd98fa91f0ae2ace95407013eadcfcae1f16d021f22e7

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