Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ea0279d2201438…

MALICIOUS

PDF

75.3 KB Created: 2021-03-03 06:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 39115c63bf22b1787cfd342d43da6344 SHA-1: 319a889883eedfa06641161b0ea7c8fce436de8e SHA-256: 56ea0279d2201438b3e07524bc523bf59226a0cae0b3dbda5a8eaa66ab2c36c9
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 and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly support an attack pattern focused on luring users to malicious sites.

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://mezovuduw.ru/strik?utm_term=trane+xe+1200+heat+pump+manual PDF link annotation
    • http://pimifawimonidij.mywebcommunity.org/how_spell_slots_work_5e.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/kindergarten_grade_math_worksheets.pdfIn PDF document text
    • http://g2am2e.xyz/962366605005hzhv.pdfIn PDF document text
    • http://canonsburglake.com/69615219424ppp16.pdfIn PDF document text
    • http://naturka.space/recruitment_and_selection_process_of_unileverpg9mz.pdfIn PDF document text
    • http://spindlndou.space/pigotibesitifivaririgazpuqdm.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/xaxuwopafowenezuj.pdfIn PDF document text
    • http://teksalle.xyz/mumivokatebedidazobepi26cco.pdfIn PDF document text
    • http://zaranes.getenjoyment.net/tensor_calculus_synge.pdfIn PDF document text
    • http://sosiwawivijomo.scienceontheweb.net/kumokiwunir.pdfIn PDF document text
    • http://lifeit.pro/kindergarten_curriculum_guide_californiapck2w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kexijilavagela.rf.gd/sofa_chair_images.pdfIn PDF document text
    • http://rodobokojezaga.epizy.com/local_tv_guide_memphis.pdfIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/9_fujifilm_xp80_finepix_digital_camera.pdfIn PDF document text
    • http://rafodize.rf.gd/bapolu.pdfIn PDF document text
    • http://puxisozebipisal.rf.gd/zizawor.pdfIn PDF document text
    • http://zamudijofo.epizy.com/74176349573.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_off0000db34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB34 4948 bytes
SHA-256: 079ee41827c0bd1acd1567b9cb62d4d417b6dcb4e87262ec021bcf668936b5e2
font_01_sfnt_off0000ebd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD4 11196 bytes
SHA-256: eb525a892c4a16e395b5bee647c1660ac3ab0f3cfef66aa6903ade3287dc8e15
font_02_sfnt_off000111fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FC 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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