Malicious PDF — malware analysis report

Static analysis result for SHA-256 953e0f97fd1f6aae…

MALICIOUS

PDF

83.7 KB Created: 2021-03-22 22:32:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 344aa1e7bd950b270d1feb32ca1892f3 SHA-1: 634d474ff0f795fe14ba425a7738ac3b55d23554 SHA-256: 953e0f97fd1f6aaec15d7299745e75ba11faf0f27ef12f1c85f962dad491fc8c
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/award?keyword=quran+pdf+in+kannada PDF link annotation
    • http://callup.today/google_my_maps_offline_nutzen8br54.pdfIn PDF document text
    • https://butadopol.weebly.com/uploads/1/3/1/3/131378795/sizok-wufewatigasozup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469631/normal_6001c4494cb22.pdfIn PDF document text
    • http://discovljzg.fun/getexotexuwabuzavexisasu97wsl.pdfIn PDF document text
    • http://vorusobowa.66ghz.com/4672284821.pdfIn PDF document text
    • http://blankid.ru/4121364420014fu9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402948/normal_5fd145b1cb60c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_60444bb11136e.pdfIn PDF document text
    • http://kernig.store/dragon_king_restaurant_causeway_bay46jly.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465151/normal_6039decc00075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_600a9898669fb.pdfIn PDF document text
    • https://porovepo.weebly.com/uploads/1/3/4/5/134527374/bdf38.pdfIn PDF document text
    • http://fastpysystem.online/tesans9e4g.pdfIn PDF document text
    • http://euromarket.pro/georgia_drivers_license_testing_locations_oklahoma5b2h1.pdfIn PDF document text
    • http://mestikon.online/raxufaj48kp0.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/1e08c2c7-4933-4a8d-ab52-63c12a66ad5f/63354841284.pdfIn PDF document text
    • http://gebutetivifupa.epizy.com/hall_ticket_2018_bangalore_university.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/696acaa6-d4ad-4621-b4a2-a86a84110aed/59865749580.pdfIn PDF document text
    • http://renowuvix.epizy.com/80805673340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b789bc-157e-4584-8c7a-db23d979407b/ancient_greek_map_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d47f9a-787f-466e-b59c-5b5b72d7a86d/wujikujezesudipirola.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF965 5640 bytes
SHA-256: c52b75951e6cd3c7c65ba3eb05c1450db8ec241af50d1acf3dc392e95aa4bee2
font_01_sfnt_off00010cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFF 4952 bytes
SHA-256: 235d33cd528bac76a187f79990f5ac49ede643fcbaefe7ff8fa483b41e8e3ac4
font_02_sfnt_off00011dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEA 10404 bytes
SHA-256: 7cf10e850388a1b1a4d03b67ced725c2f39861fb0d787753ae7fc7c321ec6925

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