Malicious PDF — malware analysis report

Static analysis result for SHA-256 5820ad942f583d9f…

MALICIOUS

PDF

80.1 KB Created: 2021-03-27 17:31:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 53b4f6164aebaa69ca3ac416e5a7488b SHA-1: 08595bd42112fa99f93e2953640f2cdd06a9a259 SHA-256: 5820ad942f583d9fe00f9d5a8b4390919b0d6868f3055ee2c73d3d1d4e1d1e82
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with the primary one being 'https://seumenha.ru/award?keyword=atoms+and+molecules+test+pdf', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, does not provide clear instructions, but the overall context points to a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/award?keyword=atoms+and+molecules+test+pdf PDF link annotation
    • http://buwubaled.mywebcommunity.org/general_topology_bourbaki.pdfIn PDF document text
    • http://xonigej.mypressonline.com/business_administration_and_finance_burlington_books.pdfIn PDF document text
    • https://pezazexumazu.weebly.com/uploads/1/3/5/3/135392870/lenodad-karerijofipolig-sabiz.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/amityville_horror_book.pdfIn PDF document text
    • http://sobuvide.mygamesonline.org/nerimusabidirobek.pdfIn PDF document text
    • http://gosejoligezo.iblogger.org/java_runtime_windows_7.pdfIn PDF document text
    • http://bezoxafeme.iblogger.org/suxajase.pdfIn PDF document text
    • http://polizoriv.iblogger.org/35434117079.pdfIn PDF document text
    • http://xonitaj.mywebcommunity.org/panasonic_telephones_amazon.pdfIn PDF document text
    • https://nadatipaj.weebly.com/uploads/1/3/5/3/135347779/fegijemigez.pdfIn PDF document text
    • http://pululap.22web.org/bitbucket_multiple_files.pdfIn PDF document text
    • http://retamos.mygamesonline.org/kitotabawijajitilub.pdfIn PDF document text
    • https://sifuparara.weebly.com/uploads/1/3/4/3/134352995/motofumaduwomu.pdfIn PDF document text
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/709788.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zadosaw.epizy.com/how_to_control_and_manage_your_anger.pdfIn PDF document text
    • http://vesebebiwimana.epizy.com/jakinolofuzomi.pdfIn PDF document text
    • http://fofanab.epizy.com/vixilegisadidolur.pdfIn PDF document text
    • http://mizetum.onlinewebshop.net/parallel_adder_and_subtractor.pdfIn PDF document text
    • http://bozejezetides.epizy.com/what_does_a_typical_american_family_eat.pdfIn PDF document text
    • http://tipofib.rf.gd/tejulukuxorubulelemim.pdfIn PDF document text
    • http://vafitinupisojud.onlinewebshop.net/your_brain_at_work_download.pdfIn PDF document text
    • http://valogaberel.rf.gd/mirajiruxininulama.pdfIn PDF document text
    • http://wufepuxirar.epizy.com/91761513420.pdfIn PDF document text
    • http://kenefokugoxetu.rf.gd/adobe_reader_9._3_free_filehippo.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_off0000faed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAED 5196 bytes
SHA-256: 66f6b948769b24a6a57da335ea7739f27f9f9ad592fee18ec14a3b3d88405447
font_01_sfnt_off00010c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8F 11332 bytes
SHA-256: 3bc4cd4c57871ad7e3df2b819355ca87723d8bf0bb5248cdea5caa85c264fd52

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