Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed2a26601409dac…

MALICIOUS

PDF

78.5 KB Created: 2021-02-18 14:39:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 280c76ebded2e3125aefe3000a601029 SHA-1: 639d7c2e94541462aa041df2ad5584863e292eac SHA-256: 2ed2a26601409daced5790e00350dfa5899b5f0017b7f222c463bcf83b1a400a
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a malicious website for further exploitation or credential harvesting. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=keedox+media+player+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374360/normal_600fba527066d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476011/normal_5ffba54b4822e.pdfIn PDF document text
    • http://mekozeka.66ghz.com/etrian_odyssey_5_map_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388046/normal_6001caf113e02.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/Z1GkBuB/telepsychiatry_services_in_nc.pdfIn PDF document text
    • https://juxusuvib.weebly.com/uploads/1/3/0/7/130739690/741c2992dbe58f0.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/gPvha1A/44620520441.pdfIn PDF document text
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/wezonim_vexaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410448/normal_602c3bd8906fa.pdfIn PDF document text
    • http://wutugupim.iblogger.org/94695593757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485016/normal_5fd63156c86c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455660/normal_5ffea89885176.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tufosugobevoni.rf.gd/blood_relation_aptitude_questions_and_answers.pdfIn PDF document text
    • http://rabibunipidozok.epizy.com/half_size_of_a4_sheet.pdfIn PDF document text
    • http://papivis.epizy.com/jokiziwi.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_off0000f8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F1 5068 bytes
SHA-256: b3470be84a1d74b06ce20a9dae6a715dfe6111cfe977e4be3390cc403840aa91
font_01_sfnt_off00010a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A26 10148 bytes
SHA-256: 3f54d2f365a1481d63c91d473c6780950b4dffc4d8340b4616fd62d933e96808

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