Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebb9f8d4076bb3c…

MALICIOUS

PDF

74.4 KB Created: 2021-03-25 21:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 80c7e57374907556cacc24c12f2b6752 SHA-1: 49efd5da502a77397ec1da75b91e619dc8b36bf9 SHA-256: 5ebb9f8d4076bb3c12ad6e6739238369254472f63b00829b53311f220612a632
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs to a suspicious domain, identified by heuristics as an external URI and flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, contains text related to examiner pay, suggesting a lure to entice users to click the malicious link. No scripts were extracted, but the presence of the malicious URL and the ClamAV detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://kuzutuzo.ru/strik?utm_term=how+much+do+cambridge+examiners+get+paid PDF link annotation
    • https://cdn.sqhk.co/bowawugafux/Xh9hhia/baby_panda_my_kindergarten.pdfIn PDF document text
    • http://ellmax-site.xyz/wivekurzxck.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/xaoqicO/19727336968.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/92680621325iumjc.pdfIn PDF document text
    • http://senaxemuj.iblogger.org/mindfulness_journal_prompts_for_high_school_students.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c79349c7-c2cc-4233-aa5f-db180a9d6ce4/marketing_digital_course_dublin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5c14ea-4de5-4b0e-b57d-f092026e5333/veg_recipes_for_fussy_eaters.pdfIn PDF document text
    • http://sipopos.epizy.com/rem_700_action_blueprinting.pdfIn PDF document text
    • http://fedaziwaropov.epizy.com/zaborupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e275847-3649-4f4d-9966-456a415cccbd/how_to_prepare_for_business_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff893051-4dcb-4dc9-aaf8-72abe6d0f2d8/descargar_libro_de_matematica_financiera_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a104933-ee75-4481-a259-04e8e7116067/fagebadubemunijojumiwim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9afff2e-e183-4ddf-b776-2caf23052ff2/zanugumasaxubodijebefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfd23426-65e2-4888-9277-f56c83db0099/85877949428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a82d038-64a7-436e-adc7-2b9c32afd340/zifukujure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e93dfaa7-8cf9-496f-95c6-f1452f60412c/berumopesogulitifesek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65621985-025b-486e-83ff-24acb9d0ec30/what_happened_to_light_at_the_end_of_death_note_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9aec1b8-b895-45e3-aa73-943810dae67f/raraj.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_off0000e5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A6 5716 bytes
SHA-256: a6fc261b65c83882bd5c3a6f05dd07afda86427363b01d4f88ed05029533290c
font_01_sfnt_off0000f8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F6 10464 bytes
SHA-256: ba9b4e1c3b024769ce4ed03784657b2f1342295e0414a86005ce550fc791d275

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