Malicious PDF — malware analysis report

Static analysis result for SHA-256 781ee116813bfa0f…

MALICIOUS

PDF

74.8 KB Created: 2020-12-23 00:00:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6762bc2607ec22f1bab190ffd4bf93de SHA-1: d0ee3e1e06b5544f3e47cf75e477eb3eeb4fc2a0 SHA-256: 781ee116813bfa0f43fdde1d9daeb557724780a965e4842ba8b43cda678b3713
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to a known malicious redirector URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of a malicious redirector suggests an attempt to lead the user to a phishing page or a download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffking.ru/strik?utm_term=livestream+mass+today+philippines In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416139/normal_5fbaf71b1e22c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_5fa5b01704700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368978/normal_5fc3a8e238c70.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://uploads.strikinglycdn.com/files/8c8e786c-942d-4bad-a7ce-23c890a5b4c2/dedobatezinutavadozipobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffcf5e13-724f-4be3-8a2c-c78d3f232a05/handbook_of_stochastic_methods_gardiner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6edea7b-abc6-4a0e-a622-c3cdb1123ceb/83348765607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee11fa57-f75a-48fb-b0bb-e94bc46aea9f/535882561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f1427d7-73b4-494f-a7c3-d03265482b30/lefiramowovatirogiki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e3df92c50b1a1e910bb7/t/5fce84ca484b4d20625762b0/1607369930153/86955856887.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe12c0ad9d1b024564de0ef/t/5fe160bfd6015b0ed4bade4f/1608605888147/charlie_malayalam_movie_720p_free_tamilrockers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d659d49dd1244740d42e/t/5fcd5759fe657040d5a27ea2/1607292762264/8408_hillside_dr_hollywood_hills.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5124e18c5c478ef28089/1606373669062/dofadilufuviguse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b81998eb-f831-4e8e-b2d3-ebe360bd846b/13597682456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a55dd2d2-eaf1-4d69-9661-9954aadedeeb/79269650688.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_off0000d6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CF 5092 bytes
SHA-256: 5c075c2daeb5987ab18d237cb4b17539b8e0a582dff69837f89e9409b8d73acc
font_01_sfnt_off0000e805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE805 11956 bytes
SHA-256: fae45ee3af9fd18f5f9b9552d999b6804a6fd18933c9e7c0090dac7fe84d314a
font_02_sfnt_off00010e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0E 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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