Malicious PDF — malware analysis report

Static analysis result for SHA-256 575a55a03c19772d…

MALICIOUS

PDF

73.2 KB Created: 2021-03-17 07:55:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4bb447197c544d7a911069b8ce8c98b4 SHA-1: 3ff4471c2de0c9e36a2eadae2492d16d2fbfe0fd SHA-256: 575a55a03c19772d3aaace2725736b859684483713670632e3d12db908637d1d
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of an external URI heuristic further supports the attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=chemistry+compounds+list+pdf PDF link annotation
    • https://cdn.sqhk.co/panafilaputu/egO1Jfh/58633490216.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/hgwhejn/39569851764.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/jcjeGUi/redcon1_gym_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/hepjiSE/woxewaboradonawirevolu.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/hep6Bhi/47178828231.pdfIn PDF document text
    • https://cdn.sqhk.co/befulirawid/ehekeOH/53082458347.pdfIn PDF document text
    • http://tumexade.22web.org/sony_kds-60a3000_lamp_replacement_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/muwupajikaro/P3gcyhj/furozu.pdfIn PDF document text
    • http://jenupekob.iblogger.org/47591312784.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/nufidibodudulad/fejiporixogekadevelipi.pdfIn PDF document text
    • http://gibexuge.rf.gd/19863051144.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/biodata_for_marriage_proposal.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/wpf_listbox_datatemplate_datatype.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/wusokijamoro.pdfIn PDF document text
    • http://diwiludoki.rf.gd/60727685136.pdfIn PDF document text
    • http://xelurutokige.rf.gd/senilamud.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/mufonuxesolalimug.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/makro_catalogue_march_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/letter_a_handwriting_sheet.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_off0000e108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE108 5192 bytes
SHA-256: 6299baaa9e4dbb5120b26e4db7215de399bd2a1660ed52a0bcbddb53b62aa175
font_01_sfnt_off0000f28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28F 10896 bytes
SHA-256: 170013febd5ad3cc044101e7e88d517a84dee408ec2ece5c84281b3600ee60f9

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