Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f090a16894d475…

MALICIOUS

PDF

79.0 KB Created: 2021-02-17 07:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1765ebc96ec68f2647a36f630f965281 SHA-1: 7ab60454bf630a40fe26b2013b425c651f055f2f SHA-256: d3f090a16894d475aec5a1eeb2507fcc14b9ec4d69fb29625bda19f9b15c2236
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit user curiosity via a search query lure.

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://seumenha.ru/123?utm_term=is+jack+reacher+on+netflix PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455669/normal_60143e2392415.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490141/normal_5fcbfbf350865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527237/normal_601a54930f58e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385216/normal_6011ea64a19e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417033/normal_6019c5aa2533d.pdfIn PDF document text
    • http://passive-income.ru/baboduranojemitopmih5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476146/normal_601ddb1cdffe1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460723/normal_5fe38508c326f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475565/normal_6009230433cb4.pdfIn PDF document text
    • http://8bitbeardsco.com/merge_shapes_photoshopurma4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481052/normal_60196a7c74736.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457573/normal_6009417dd5e58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401558/normal_5fd1c6476ce19.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/lewuli/zumesawabalola.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_off0000e97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97A 4904 bytes
SHA-256: b73169d9ce3ffdd9275eb37adc1805a538f485a4d9d797d770215326766b1dba
font_01_sfnt_off0000fa0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0D 11700 bytes
SHA-256: 16762d576ba062715c63d44170e214e3db44fc673df53192c07012ddce2c215c
font_02_sfnt_off00012100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12100 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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