Malicious PDF — malware analysis report

Static analysis result for SHA-256 55de9951ea813b07…

MALICIOUS

PDF

73.5 KB Created: 2021-04-03 13:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cdb749b3cc922d022e8f2a77f2e63f75 SHA-1: 70a0d193b64567d454bc7757f69619ac40e4a76b SHA-256: 55de9951ea813b0757c33493a5a22866b4e3374dfc9477400b159b5df3c358f5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a domain associated with phishing lures ('resalured.ru'). Heuristics indicate the PDF acts as a link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/award?keyword=holt+sociology+textbook+pdf PDF link annotation
    • https://cdn.sqhk.co/jabosuve/gjihkja/nefalo.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/suzosifuwezowa.pdfIn PDF document text
    • http://budofibo.mygamesonline.org/java_swing_gui_programming.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/tjeigiB/cartoon_wars_3_hack_2019.pdfIn PDF document text
    • http://ita-yog.space/asset_based_information_security_risk_assessment3n2zk.pdfIn PDF document text
    • http://productwood.ru/manual_control_universal_rca_systemlink_4wbsmu.pdfIn PDF document text
    • https://mawetifatine.weebly.com/uploads/1/3/2/6/132683292/nosutovikugejopojak.pdfIn PDF document text
    • http://xotizel.iblogger.org/synonym_for_formal_request.pdfIn PDF document text
    • http://rusakadovub.sportsontheweb.net/27763518990.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/makoxawata_jagunoza_loxizanapulud.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/shop-vac_5-gallon_2.0_peak_hp_vacuum_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/hgebMZv/youtube_to_mp3_android_app.pdfIn PDF document text
    • http://artyom.guru/sazifabotugudomoffnbj7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_ad39e7fd01a24798a8bdcb79bc7c157e.pdf?index=trueIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_2581199ca3ad4076ac605eca237e05a3.pdf?index=trueIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_0c4829b1d37c45ed81b3d37ed8aca5b0.pdf?index=trueIn PDF document text
    • http://renureva.epizy.com/kafogidunokibaxafomi.pdfIn PDF document text
    • http://savuxerekeze.epizy.com/burimadikununubiminito.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/wix_oil_filter_for_2007_honda_civic.pdfIn PDF document text
    • http://gofapebilim.rf.gd/58210171231.pdfIn PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_4903a0c903e34dc985974a056497513f.pdf?index=trueIn PDF document text
    • http://dogirajuwuxo.epizy.com/napawumesomuravaxezizu.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
    • 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_off0000cad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD0 5352 bytes
SHA-256: a74d660f1da3567532dd7ee4c2032c7c8b023807dbd128a076c20452a899a616
font_01_sfnt_off0000dd28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD28 10644 bytes
SHA-256: 1d08f13103eef4ee2865f7a3a3e8a2ec743e9b6f3a67f58548cb2f0d8e028c77
font_02_sfnt_off000101d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D5 16084 bytes
SHA-256: 3dd6252bb62cdcc21e2b76bdeb68ba6c8db9c2d08edae94764e010183c5b1848