Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e16b92c4842f5a…

MALICIOUS

PDF

75.8 KB Created: 2021-01-05 05:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f56d92ddbeff969326d18f87e83651e1 SHA-1: bc6555daee1c0389b201f679f511f7944f942bab SHA-256: 14e16b92c4842f5a88e7fc4ba1821741ec227c60e0f7b9922f4a5429552338f6
96 Risk Score

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 suggest an attempt to exploit users through a deceptive document.

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://trafftec.ru/aws?utm_term=liver+disease+guidelines+uk
    • https://cdn-cms.f-static.net/uploads/4529697/normal_5fdb71dfd3525.pdf
    • https://cdn-cms.f-static.net/uploads/4485436/normal_5fba4941a5871.pdf
    • https://cdn.sqhk.co/pomiwuximu/fjjgggg/wugapekafuduxi.pdf
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5f8b51ecd9607.pdf
    • https://static.s123-cdn-static.com/uploads/4372086/normal_5fe1c25f9c8fa.pdf
    • https://static.s123-cdn-static.com/uploads/4421787/normal_5fc9ead781582.pdf
    • https://cdn.sqhk.co/perigupa/ajfiawV/7886850333.pdf
    • https://cdn-cms.f-static.net/uploads/4486367/normal_5fb7eec306041.pdf
    • https://cdn-cms.f-static.net/uploads/4410432/normal_5f9ce6f70d13c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1dd0ceb8-b7ee-4c47-9cbb-1b97af6600c6/fazogum.pdf
    • https://uploads.strikinglycdn.com/files/bf0c0d40-9b5d-4cd0-89af-e4b13d00706f/20787611329.pdf
    • https://uploads.strikinglycdn.com/files/604c0f64-e538-45ce-9f26-45804ef91502/73967351376.pdf
    • https://uploads.strikinglycdn.com/files/6f0a29b5-66b7-43f8-9cd5-a3dbd10e2b80/english_grammar_betty_azar_fourth_edition.pdf
    • https://uploads.strikinglycdn.com/files/01b02037-85fb-4034-8d5d-7e5be99a07ba/86731727915.pdf
    • https://medlineplus.gov/liverdiseases.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee37.bin
081b1e7de00a169832f79785e3dba0c531ac551704fe1a7ebb4e7166edeb9e7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 5060 bytes
font_01_sfnt_off0000ff86.bin
806030888731d2016007a9e6d5d3ccd19ac5e9523806341b13278c4427c22e23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF86 10200 bytes

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