Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4e54453411fce8…

MALICIOUS

PDF

76.8 KB Created: 2021-02-17 17:30:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dd4a02f82ed9042cdb0c33869c8d7d39 SHA-1: 54124597a2c0726092f9d6beaa8d93201c66c9f6 SHA-256: dc4e54453411fce8ca65f1c503e6bd9c583f0bec338f9f37c8f9023ddcf72917
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting an attempt to manipulate search results or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=par+quoi+remplacer+du+mascarpone+dans+une+recette PDF link annotation
    • https://cdn.sqhk.co/fasotaluvose/cI9bhaP/serilalowadupafonu.pdfIn PDF document text
    • https://lopenedaxi.weebly.com/uploads/1/3/1/6/131606218/duroduxuwawizasagili.pdfIn PDF document text
    • http://petersikdar.com/97372312586ef27p.pdfIn PDF document text
    • https://retetozatinum.weebly.com/uploads/1/3/0/7/130775023/kamefe_zefowaverejalu.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/dOPHGib/naxajuvidirukigezuf.pdfIn PDF document text
    • https://ladunibik.weebly.com/uploads/1/3/4/0/134096621/jijekuwinati_bivevokujoxuw.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/djbeMCl/steven_universe_save_the_light_walkthrough_strawberry_battlefield.pdfIn PDF document text
    • https://niravewowinud.weebly.com/uploads/1/3/5/3/135343761/gewivuximuk_ruposimilepak_bozekunoru.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/bofake/nafoxaxux.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/adipec_2019_exhibitor_manual.pdfIn PDF document text
    • http://volapubexu.epizy.com/san_francisco_5sos_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/l_test_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/hc_verma_ray_optics.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/roritifodokujekunuwonasi.pdfIn PDF document text
    • http://xebowuruno.epizy.com/quaker_parrot_care_sheet.pdfIn PDF document text
    • http://tukutuxobolekub.epizy.com/23205073761.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_off0000e957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE957 5344 bytes
SHA-256: 40c280c5c23e1f3ce57a67dd77b1aefb46bbd5d77adb63146f6079809d757c19
font_01_sfnt_off0000fb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB68 13160 bytes
SHA-256: 672ee9224b721082ff709bc442a86c802db3732b21ddbfcc22acee60eab166fd

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