Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf8e5deffaf77607…

MALICIOUS

PDF

84.5 KB Created: 2021-03-24 21:02:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbc3483eacf8a3162de49bb41bc3ecf5 SHA-1: 1f0660ca84391df5bcc64b7f0f3cad234f5075dd SHA-256: bf8e5deffaf776078747d78c6cc762293907be5b0b732f5c1768877feef5ab5e
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that lead to suspicious domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Bosque seco tropical del ecuador pdf' and 'wkhtmltopdf', likely a lure to disguise the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=bosque+seco+tropical+del+ecuador+pdf
    • http://gimatadokij.mygamesonline.org/oral-b_1000_vs_1500_vs_3000.pdf
    • http://nakekizedexu.getenjoyment.net/zofafagudonoluzepilopibu.pdf
    • http://zixivudu.getenjoyment.net/t_fal_deep_fryer_stopped_working.pdf
    • http://nekidifuton.medianewsonline.com/40346191484.pdf
    • http://tideboweped.medianewsonline.com/definitions_of_sociology_of_education.pdf
    • http://zakosemej.mypressonline.com/all_animals_name_with_picture_in_english.pdf
    • http://linufiwanekume.scienceontheweb.net/mutukebiw.pdf
    • http://suzofovolavuk.scienceontheweb.net/viwowofewekojoforofur.pdf
    • http://befotuke.mywebcommunity.org/51715965225.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0ca889ec-2831-4e87-bec0-4c2e3fae93ed/jurazobufadekaloz.pdf
    • https://s3.amazonaws.com/kabisebax/75909651220.pdf
    • https://uploads.strikinglycdn.com/files/47f7fdd6-5783-45ef-bf26-850bf867ca14/pevunuli.pdf
    • https://s3.amazonaws.com/megodipewukitoj/cadbury_dairy_milk_top_deck_nutrition_information.pdf
    • https://s3.amazonaws.com/xujitezu/57892250915.pdf
    • https://s3.amazonaws.com/wusigipufuvowix/lulidenonatamamunakafo.pdf
    • https://uploads.strikinglycdn.com/files/b9f710a0-c78c-473b-a4be-0b2b606f5488/3212962804.pdf
    • http://wugadavax.epizy.com/asseverazione_di_conformit_della_copia_cartacea.pdf
    • https://s3.amazonaws.com/dazifozixawus/bewajetirematagipovunudop.pdf
    • http://kibozeriso.epizy.com/adjetivos_en_ingles_ejercicios.pdf
    • http://siniligavaxuvul.onlinewebshop.net/why_wont_my_samsung_tablet_connect_to_hotel_wifi.pdf
    • https://uploads.strikinglycdn.com/files/e123cfbc-c72f-489c-945f-04d3f076ed45/gujabugozowekusekibagu.pdf
    • http://mevidow.epizy.com/diralanufizibu.pdf
    • https://uploads.strikinglycdn.com/files/dc495182-dc89-4490-9b84-471cd3b9a036/cfa_level_1_syllabus_investopedia.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a87.bin
5562c3351ca489c2386793e7e0bf9c210c5f0d24560f44fb3ade5205f0001a2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A87 5324 bytes
font_01_sfnt_off00011cb0.bin
49dc7b31263f1133394cca9bf89b5de74c25fba8826e907b9e71098728220e3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB0 11704 bytes

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