Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49a8c7a35b52dcf…

MALICIOUS

PDF

80.8 KB Created: 2021-03-18 23:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1b7a7a4bf895df7396e1bd4fb9a05820 SHA-1: d6e39a2c6f3212ecfa738db4fe2e182788aaf74e SHA-256: b49a8c7a35b52dcfb993c3431b80f379de412ea92d3988acaf30395d00fd0aa5
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests it is a PDF file generated by wkhtmltopdf, potentially used to mask malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=html+code+table+column+width PDF link annotation
    • https://cdn.sqhk.co/rajunakeb/1FeB3CA/bazub.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/Jhif7wM/88000383224.pdfIn PDF document text
    • https://cdn.sqhk.co/povuguzuloga/ghaihif/applocker_logs_location.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_6038834f73ccc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456705/normal_605392e373374.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481665/normal_5ff16fbab0f09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393369/normal_5fe08de42b52d.pdfIn PDF document text
    • http://watewuwij.22web.org/free_actors_resume_template.pdfIn PDF document text
    • https://cdn.sqhk.co/kozuvurop/iHaejbU/mad_dex_arenas.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/sgddwic/revolut_auto_top_up_ios.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
    • https://s3.amazonaws.com/bogijexu/mabezumilamefox.pdfIn PDF document text
    • http://jodaniti.epizy.com/burimagitokiluzuviri.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/latin_american_city_model_ap_human_geography.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/42275768607.pdfIn PDF document text
    • http://vuzujalaj.epizy.com/xebezirakiwamowifinivimus.pdfIn PDF document text
    • http://sabesadunapas.epizy.com/lawewuwumafopaz.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/goodbye_stranger_piano_sheet_music_free.pdfIn PDF document text
    • http://fobufalezax.epizy.com/powuvubivezugi.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/junusigafo.pdfIn PDF document text
    • http://lalejifidesuwo.rf.gd/preventive_maintenance_report_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/bepuwugud.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/93588044132.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/free_mobile_phone_antivirus_software.pdfIn PDF document text
    • http://famereraba.epizy.com/atrial_fibrillation_management_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/how_many_calories_are_in_a_krispy_kreme_maple_glazed_donut.pdfIn PDF document text
    • http://zuwapupefitojit.rf.gd/garmin_405_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/bluey_theme_song_sheet_music.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_off0000efec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 4980 bytes
SHA-256: 7bd557118aa7c03e7f72c5c0f90aef4aa677b66fdd15d7d092ca8827988917fc
font_01_sfnt_off000100b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B3 11708 bytes
SHA-256: 2e8a5ac920c92c1f9966b6cbce2e1c643114cb0a4aa1881029f319f541c94655
font_02_sfnt_off0001275c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.