Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec5db2ea994b152…

MALICIOUS

PDF

68.4 KB Created: 2020-12-23 23:51:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 202d2abd45f5abf02c623dd6f6a700f0 SHA-1: 147f8907038770f8bb9ceed26b9189292ec84be9 SHA-256: 5ec5db2ea994b1529ce4d30c8216a92b984a4df067379dadd68c1b285810a724
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating a high probability of maliciousness. The document contains a large number of external links, many pointing to PDF files, suggesting a link farm or phishing attempt. The primary malicious URL identified is traffset.ru, which is likely used to host or redirect to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=wayward+pines+book+pdf PDF link annotation
    • https://dotaterezisal.weebly.com/uploads/1/3/4/7/134771172/f4084b0f47a2121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_5f8b9487dc0d6.pdfIn PDF document text
    • https://sawinabepetejex.weebly.com/uploads/1/3/4/7/134714359/dopavetipisubew.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/koxoreninawoser.pdfIn PDF document text
    • https://simokenuma.weebly.com/uploads/1/3/5/3/135311421/fufajiwo-fisubonuj-vukafon-tutevuv.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/xamapebonijos/31742259589.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/pudadizefafitavi.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/psychrometric_chart_problems_and_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b1a9019-8410-4f3b-b78f-6d55fa62c5b4/87090533443.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/telugu_dubbed_tamil_movies_2019_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/lisa_birnbach_divorce.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_off0000cc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC57 5416 bytes
SHA-256: a1b0447c8e1dbe62f5b77f9c433ac306b50069800749962f96baeb08bd76d263
font_01_sfnt_off0000deef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEF 11068 bytes
SHA-256: 00867fd670044d0235c240f10c5a6ba7e76d24261c44c5671679f1552efb586a

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