Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d11a8af2b3a189…

MALICIOUS

PDF

80.0 KB Created: 2021-04-03 15:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 155ba2debe925bf8cc3324fe49ed72d1 SHA-1: c2317533a366bcf4150a9d0246d3f1218eb5ead0 SHA-256: e1d11a8af2b3a189b2765d48cd1cb424e1be1bea3f5af8751481702726b220e3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://ponafet.ru/award?keyword=periapical+cemental+dysplasia+pdf PDF link annotation
    • http://motivawka.online/rarubuzuzosuwedujorofuw3ofc.pdfIn PDF document text
    • http://cupe1.ru/204138202341z2ry.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391602/normal_60063bc26f3ec.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/bc_road_map.pdfIn PDF document text
    • http://nudekebe.iblogger.org/apology_letter_for_mistake_at_work.pdfIn PDF document text
    • https://xupazipul.weebly.com/uploads/1/3/5/3/135325103/13949d55a.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/zadiva.pdfIn PDF document text
    • http://ridaxaki.mywebcommunity.org/casio_hr-8tm_calculator.pdfIn PDF document text
    • http://nasty666.space/astro_a20_wireless_headset_manual98fi4.pdfIn PDF document text
    • http://sutivetowit.mypressonline.com/91012951272.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/define_luxury_goods.pdfIn PDF document text
    • https://migawonakizize.weebly.com/uploads/1/3/1/6/131637147/17e897652f3a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443823/normal_5ff6630b90fba.pdfIn PDF document text
    • http://buxozadogaro.22web.org/adobe_reader_offline_installer_free.pdfIn PDF document text
    • http://defakoja.iblogger.org/interview_questions_for_bca_freshers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_60137bf3f3970.pdfIn PDF document text
    • https://vabadagijuruka.weebly.com/uploads/1/3/1/8/131856539/1850610.pdfIn PDF document text
    • http://usacreditscore.info/how_to_thread_a_brother_digital_sewing_machinesw46h.pdfIn PDF document text
    • https://raputaluwim.weebly.com/uploads/1/3/1/6/131606275/5892204.pdfIn PDF document text
    • http://begemotiks.space/gewodelusexemaxufir8qkkd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://povuputuk.epizy.com/carriers_2009_full_movie.pdfIn PDF document text
    • http://fewodekikagusag.rf.gd/niguvoxu.pdfIn PDF document text
    • http://bibobega.epizy.com/csgo_report_bot.pdfIn PDF document text
    • http://lujuxug.epizy.com/forensic_anthropology_training_manual_3rd_edition.pdfIn PDF document text
    • http://kanulojijuk.rf.gd/raw_vegan_recipes.pdfIn PDF document text
    • http://gegekekesi.epizy.com/letoko.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_off0000f9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E1 5404 bytes
SHA-256: 651d3583faa95f9205eac77323874b4c0b2629245194f279259e22e44b7421f2
font_01_sfnt_off00010c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C32 11780 bytes
SHA-256: 4a20bf28d15665464f14a7b6fa4e436fd5ba81e22aa2aedd887a94ca28b0f143

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