Malicious PDF — malware analysis report

Static analysis result for SHA-256 799a85e2049f58b5…

MALICIOUS

PDF

71.7 KB Created: 2021-02-19 02:11:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e8bb8e3c84578e50c86ee96eb59ea45b SHA-1: 7d40fc4ddd9181e855f1e067f45103927dfd16ef SHA-256: 799a85e2049f58b5f03da920a9c0d366a2babf041b4239905ec9e1795c6b992d
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=where+is+the+menu+button+on+my+xfinity+remote+control In PDF document text
    • https://widalafamibag.weebly.com/uploads/1/3/0/8/130814492/mafivuravuxe.pdfIn PDF document text
    • https://vorebalulu.weebly.com/uploads/1/3/5/9/135962534/2e03d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485318/normal_6027fc83bd1b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370090/normal_5fcf93e901f0f.pdfIn PDF document text
    • http://perevod-card2card24.site/897945752255o5dl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374715/normal_5fc67526cbca2.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/dfe6b74967f8.pdfIn PDF document text
    • https://jefaganogebe.weebly.com/uploads/1/3/1/4/131437435/fojagepagugoxi-goveribodarezot.pdfIn PDF document text
    • https://buronoveze.weebly.com/uploads/1/3/0/7/130739674/fenapusirovuna-fejebaxuvar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ligesetuvijaga.epizy.com/4581856860.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/icao_aircraft_performance_database.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/new_auditor_s_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/fuweropikakizidegabop.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/sovavix.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/10069429832.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_off0000daf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF3 5236 bytes
SHA-256: 80521345cb58581fe5a8ab13289af6549c1f47ecc1cd7d039cf5078883dbf079
font_01_sfnt_off0000ecb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB6 10804 bytes
SHA-256: cbc28f0e7f038842b293369abca5c401b133501ebb2306643e2a726b33a549af

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