Malicious PDF — malware analysis report

Static analysis result for SHA-256 327fcb6dfb808b02…

MALICIOUS

PDF

77.8 KB Created: 2020-11-17 11:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 1af0d025c6f409af59233ea7e1325e2e SHA-1: 1616deebae6dbbfcd9a34360412081c982fb892e SHA-256: 327fcb6dfb808b028e1503183f6c77511173c7a84864d5644a3e8cd8fa2b7710
154 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is likely intended to lead the user to a phishing or malware download site, disguised by the document's content which appears to be a French spelling book.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/aws?utm_term=livre+d%2527+orthographe+francais+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413112/normal_5f9704c9b9f7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377379/normal_5f93cd48c6c3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394062/normal_5faa333d6306e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481699/normal_5faf2a51c247b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_5fa2cf51d26d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_5f9c5fa4cdcaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465704/normal_5fae7316be9e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_5f9b86a1b8734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392868/normal_5fa3f0e607657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443588/normal_5fa439221a242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387242/normal_5f982347953d5.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/mejawiwomak/99405872552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a864b0d-297e-4d1d-8e05-fe9a20e143bd/xabusalasanozuwamidixez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60f4628d-3d89-44ee-8509-e39731305bb1/48407542321.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/bu_university_admit_card_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/examen_ceneval_exani_ii.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_off0000ef8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8D 5420 bytes
SHA-256: 0ccd8d5b6e96115893398dd89a6dd0f825496e9cf7049904d97c5c6da48db7b0
font_01_sfnt_off00010210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10210 12304 bytes
SHA-256: a81c170f578fa637dffe73a750f2006f55942fafa777772e1cfab68aeab4b4e5

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