Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce83974e54b6cf34…

MALICIOUS

PDF

79.0 KB Created: 2021-05-17 04:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e2a5002bc9ab6039d494f5fcb061884b SHA-1: be7e13ffce2686b5931a8d364c52816bd30a4096 SHA-256: ce83974e54b6cf347c53013e7dd153f19b23000f5f30bc66b27e6fc9490c83aa
126 Risk Score

Malware Insights

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

This PDF document, identified as malicious by ML classifiers and ClamAV, contains numerous embedded URLs pointing to potentially malicious sites. The document body, though heavily obfuscated, appears to reference industrial equipment manuals, suggesting a lure to trick users into visiting these sites. The presence of external URIs and a link farm heuristic indicates a strong intent to redirect users to external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/strik?utm_term=liebert+gxt3+3000+manual PDF link annotation
    • https://cdn.sqhk.co/pamomusemida/gfziax7/pawipijafobefivemab.pdfIn PDF document text
    • https://cdn.sqhk.co/wisewuguv/8tnVXhf/figuzomubunabobapirijaru.pdfIn PDF document text
    • https://xelenupexom.weebly.com/uploads/1/3/4/4/134480667/9c680788d1d43d.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/trane_xl90_service_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/dojerilu/D8jegg1/vugitunisisexusawalitu.pdfIn PDF document text
    • http://buxeletifexid.medianewsonline.com/88872504364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420608/normal_6044da17cd5a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388413/normal_6067b1c1b79f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445869/normal_602792a5767a3.pdfIn PDF document text
    • http://nuxuzuruguli.mypressonline.com/carry_on_my_wayward_son_lyrics.pdfIn PDF document text
    • https://kibajalixil.weebly.com/uploads/1/3/0/7/130739780/897070.pdfIn PDF document text
    • https://kobizixudowizeb.weebly.com/uploads/1/3/4/4/134402546/sagazavuvoluwi.pdfIn PDF document text
    • https://cdn.sqhk.co/vavusiwi/kij9F43/tubi_movies_free_app.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/1qijQkc/avaya_phone_manager_pro_download.pdfIn PDF document text
    • https://wugarusuxota.weebly.com/uploads/1/3/0/8/130814120/nifigejojokek-duzazikudazubin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470532/normal_5ff3c6ad43671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413369/normal_604e42e151952.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/78617c8a-27f0-48c1-ae25-0e7d2eadb123/arabic_alphabet_worksheets_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cecc827b-b797-49b6-a1f1-77d9713cfde4/lumixojomepuxulin.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/ariadne_labs_innovation_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/relirodiderezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e3fe171-e87f-4ddd-a182-a5b796e56dc0/roper_refrigerator_not_cooling_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c807a045-9a19-4255-ad36-fb0cfb7c57d1/2199563873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e4167d-a4c2-4b48-8300-ff4428ba3b90/nonosulumilujudigava.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/1405166932.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_off0000f617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF617 5280 bytes
SHA-256: b4a50bf8b3ef4656e2b10b72e438bfc4e0394277cc76bb03157e5e311935a671
font_01_sfnt_off00010803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10803 11140 bytes
SHA-256: 84d72472439057884e5373773972302f800a540b7b78972518f016fd36ddf206