Malicious PDF — malware analysis report

Static analysis result for SHA-256 546dedbeaa48aec7…

MALICIOUS

PDF

80.9 KB Created: 2020-12-08 05:20:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ef814aa010b29c9ade771ce0ecd0894f SHA-1: 9c9be6bd3afb191c92e349162f0934bbd910efcd SHA-256: 546dedbeaa48aec74124b98f74a926b2986f77ff1c86106a714f049dc72f4e82
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/strik?utm_term=it+cosmetics+bye+bye+foundation+sephora PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450641/normal_5fa2933d09884.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465015/normal_5fc883e885594.pdfIn PDF document text
    • https://gajitiromivalot.weebly.com/uploads/1/3/4/4/134475956/jopujorev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387703/normal_5f9d09bc93ce3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474449/normal_5fceb1b446fe2.pdfIn PDF document text
    • https://xekawipafamut.weebly.com/uploads/1/3/4/3/134328312/dc767b47180a232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5faf0ee256a6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451971/normal_5fa2fd9ca171e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f9a806678513.pdfIn PDF document text
    • https://muwegejise.weebly.com/uploads/1/3/4/2/134265646/mawinafakipezer_zovowezebakep_pamopufawe.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/rijedifatufod/35496026313.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/operational_risk_management_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/611875bc-4402-4560-88fd-6d82960cbfbf/41902913636.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE283 5424 bytes
SHA-256: 624cbb5b5bcf1d051c798f93dad3e9b685d436ff9591ebdf50ff655066d5f495
font_01_sfnt_off0000f4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B0 3100 bytes
SHA-256: 945f9335a7dfc237b64234a962573a7cafdfe5dc621cb1ea4c0be4fad2d8902c
font_02_sfnt_off0001016d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016D 11416 bytes
SHA-256: de7a2c962d9c30fd94c2d7bba4203ada4e08a5dfb6a43676e8ebb8a7e8b461a4
font_03_sfnt_off000127fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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