Malicious PDF — malware analysis report

Static analysis result for SHA-256 58225d9e90b6ad4a…

MALICIOUS

PDF

65.9 KB Created: 2020-12-22 20:24:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7bae8d670f42745751d8fac3c29970b1 SHA-1: 7186588352de7bd118eff571e06cf0fd19e88db1 SHA-256: 58225d9e90b6ad4afcc0ea148001e22475ac5bcf1601c73487745f52ab72a9ae
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, suggesting an attempt to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to exploit user trust.

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
  • 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://trafftec.ru/aws?utm_term=army+business+case+analysis+guidebook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f88d8d38602c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417118/normal_5fcaf4502d8a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413973/normal_5fd125b20bd85.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/xaroxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411270/normal_5fba146eba3d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424683/normal_5fd67426cd174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460686/normal_5fbd891a43120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446263/normal_5fd9184ada3bf.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/16b5df21a755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5fd9427d2f124.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477658/normal_5fc5ec64f0718.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/40296881354.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/nexix.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/26069434973.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/how_to_get_watermark_in_excel_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB71F 5356 bytes
SHA-256: 01ca4bd151ded3b2e8bae2b3490a6381e38a9e64b4b4d456988fcc79a60ab8d0
font_01_sfnt_off0000c92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92B 10320 bytes
SHA-256: 82ba24d02580e4e6a590221431695ebb6fe83d020001a6f155a2b39fbfbf5d4c
font_02_sfnt_off0000ec44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC44 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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