Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc6a2aa0ba2cedb…

MALICIOUS

PDF

64.5 KB Created: 2020-12-20 21:51:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7494ac1d44f994e1647bac433178ecbe SHA-1: e9863f15e6ecf1dd210349a4b05b660a4b653ee2 SHA-256: 7fc6a2aa0ba2cedb2c09e29efaabc6b441977824527b84bffbe11bbd56afeb75
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL, 'https://trafficel.ru/strik?utm_term=mesd+school+calendar', is likely used to deliver a secondary payload or redirect to a phishing page. The document's metadata suggests it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?utm_term=mesd+school+calendar PDF link annotation
    • https://gatilesajegume.weebly.com/uploads/1/3/1/0/131070678/6aed2922a19e.pdfIn PDF document text
    • https://jafakafewubili.weebly.com/uploads/1/3/4/3/134397715/1336010.pdfIn PDF document text
    • https://tilotifibow.weebly.com/uploads/1/3/4/5/134505855/vifelologe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e64678b-72dd-4b8c-8370-39501047bfca/the_black_dagger_brotherhood_an_insider27s_guide_read_online.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/10318100401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bbabc7f-3275-4bd8-bc54-9296afb70e23/zeveji.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc052d83dfdd95b60d21819/t/5fc395569ee0f32b87c1b7bb/1606653271121/gimp_sharpen_scaled_image.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38e9481-df1b-478f-a6bc-24435ba53d63/5e_power_word_kill_wild_shape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db8af92-ae58-46ee-962e-64d3af34a104/61207435300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952e4185-c600-4093-a94c-723ad7ac8c8e/74150596064.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc109f45e8e827d428e9438/t/5fd2180ab91f50015ef5187a/1607604235729/jellyfin_android_tv_select_user.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ca06564-b28a-4cec-9971-49f352946f48/mataniruzusizepamofa.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_off0000c289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC289 5032 bytes
SHA-256: 04ccf0024d6330891503da2cb3287b2a90514a3420bb1f1d13bd54d7af1e5990
font_01_sfnt_off0000d3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A4 9916 bytes
SHA-256: 57e20a54c73e5f3efe9e0f55136251cb45cc6a85ad9017b612c76e8a872108b6

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