Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad172d938064183…

MALICIOUS

PDF

103.9 KB Created: 2021-02-16 02:34:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 64225e48f746b7defc141613dbe6af77 SHA-1: bed953eda501179690e15c56ef77e2f7ba37f95f SHA-256: 5ad172d938064183b91306f87e292626603ef822ef6e747ff3f5c2aee2b8ee2b
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of an external URI pointing to 'baarspo.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest it's designed to exploit vulnerabilities or trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=h+nmr+spectroscopy+principle PDF link annotation
    • https://cdn.sqhk.co/kinibemazoz/eTnhiO5/winipenuximigajujeteki.pdfIn PDF document text
    • http://all-system7.work/92004440329ol2cz.pdfIn PDF document text
    • http://verefdliyvtorogo.xyz/44996033223elxtn.pdfIn PDF document text
    • http://biomanua.website/que__a_lei_de_ampere_e_para_que_serai59g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/guidelines_for_exercising_while_pregnant.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/em_385-_1-_1_accident_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/sedovotijugipenomuzufe.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/american_pie_4_full_movie_filmyzilla.pdfIn PDF document text
    • http://zurekenalemone.rf.gd/31260662961.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/sotexe.pdfIn PDF document text
    • http://finunaji.rf.gd/fds6679az_datasheet.pdfIn PDF document text
    • http://dizutobasuxolom.epizy.com/radio_show_timeline_template.pdfIn PDF document text
    • http://vutimeban.rf.gd/spotify_music_for_offline_use.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/biology_book_free_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/booster_seat_guidelines_weight_and_height.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/fenotidabanobatipadop.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/current_liabilities_balance_sheet_classification.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/post_form_data_with_file_using_ajax.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/ccvis_form_filling.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/54368290012.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_off000158af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158AF 4932 bytes
SHA-256: 63c8b0b5208f7a92c003ad5e3e1baa473eb68f1f9010a67b775822b58fa52d01
font_01_sfnt_off0001696b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1696B 12312 bytes
SHA-256: 99df7b4a8017dc277d43040b2cc1ea378e5b8096dab649bfd24563e6cc2bfa80

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