Malicious PDF — malware analysis report

Static analysis result for SHA-256 451b2f834622c789…

MALICIOUS

PDF

72.4 KB Created: 2021-03-03 01:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3420bcbd3a1cf2887abdd93aaf6a5f92 SHA-1: 99c7b73c3cd0312a01dee04d781c949fdf596561 SHA-256: 451b2f834622c789d987f311cb5c63269c05c9a843e3b9dbc8983732046d0b78
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. One prominent URL, 'https://baarspo.ru/strik?utm_term=wine+bible+dream+meaning+of+fire', suggests a phishing or content manipulation motive. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The embedded nature of these links within a PDF document strongly suggests a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=wine+bible+dream+meaning+of+fire PDF link annotation
    • http://tadudibelebow.iblogger.org/jason_and_the_argonauts_2000_full_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452593/normal_602fb942df600.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490515/normal_5ffe60f443688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416494/normal_60189f399079e.pdfIn PDF document text
    • https://fevolubepekero.weebly.com/uploads/1/3/2/3/132303134/bazupabezepaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472491/normal_5fee117da856d.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/loneminovu/54195757865.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/pifawo.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/parallel_and_series_circuit_diagram_worksheet.pdfIn PDF document text
    • http://motagetezo.epizy.com/sikuxejidek.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/51651641364.pdfIn PDF document text
    • http://laxuraxosolun.epizy.com/bewurutofuzabizapa.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/87992855764.pdfIn PDF document text
    • http://repajazofuwide.epizy.com/xapojiz.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/internship_report_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/77353220957.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_off0000dd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5C 5204 bytes
SHA-256: 81375b6374ae769f0c964a2afef558f1c44414b68a83566f89d54fca83983bb4
font_01_sfnt_off0000ef06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF06 10604 bytes
SHA-256: 9da77d777f5699a2a02e7b3e1c453e9aeefd53496114e39179185a900ea92e21

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