Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8a993920d4d3307…

MALICIOUS

PDF

84.6 KB Created: 2021-03-17 15:04:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7bd912e705c34fd0f5f391ec68fb5f0a SHA-1: 2904f350b6c455aa47a401ff6a5b4fcb5d788d78 SHA-256: b8a993920d4d3307c01f4a81c1ded225cff4ef376b33191b578e7b5e51c1a159
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URIs, with a primary focus on 'https://botokaw.ru/123?utm_term=airplay+mirroring+apk', suggesting a lure to a malicious site. The presence of multiple external links, some on disposable hosting, further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/123?utm_term=airplay+mirroring+apk PDF link annotation
    • http://lajodibibodi.getenjoyment.net/80882820896.pdfIn PDF document text
    • http://chebsvet.ru/que_es_el_estado_de_derecho_mexicanov5dp2.pdfIn PDF document text
    • http://digitalmedialit.com/jiwigefenoxanesumetivifiztjg3i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370054/normal_5fc746287673d.pdfIn PDF document text
    • http://firstflirts.site/dengan_apa_kan_kubalas_piano_sheet58s3q.pdfIn PDF document text
    • http://manekobe.22web.org/pulmonary_av_malformation_ct.pdfIn PDF document text
    • http://jijagigipijum.iblogger.org/bhagavad_gita_chapter_12_sanskrit_and_english.pdfIn PDF document text
    • http://rabota-plus.club/lusuma4rlh5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5fe8ad4bbd027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460944/normal_604f5746d78a4.pdfIn PDF document text
    • http://fewutame.getenjoyment.net/49259746163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474736/normal_602fdb0747572.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dapizodipe.myartsonline.com/mini_german_shepherd_puppy_price.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/fahrenheit_451_test_questions_and_answers.pdfIn PDF document text
    • http://tumaselopewebu.rf.gd/belajar_coding_python.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/como_tirar_as_manchas_da_pele.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/37085068744.pdfIn PDF document text
    • http://kibiviridox.epizy.com/abrsm_strings_syllabus_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/wezironipapufo.pdfIn PDF document text
    • http://vorawaforase.epizy.com/auto_detailing_service_menu_template.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/nessun_dorma_translation_english.pdfIn PDF document text
    • http://xonelamurojili.rf.gd/78045798738.pdfIn PDF document text
    • http://riruzozijin.rf.gd/36833937814.pdfIn PDF document text
    • http://sobavetugobi.epizy.com/tascam_dr_05_recorder.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_off0000ec46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC46 10248 bytes
SHA-256: 224ce76cf7f46618e86e254bc6bf19236d4f2d40f7df026dc72db20a551b9f32
font_01_sfnt_off00010c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C95 5116 bytes
SHA-256: 23a9d638300e14b4d7e0721e26a37c939f4467df174005d485b3ff2e83e1646b
font_02_sfnt_off00011df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF5 11128 bytes
SHA-256: 0e86f9f4e8d8c5a2cccc99c2a70575903ca967b038a058fa29fe9b11770785e1

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