Malicious PDF — malware analysis report

Static analysis result for SHA-256 4320528997cd48bf…

MALICIOUS

PDF

69.4 KB Created: 2021-01-06 03:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 269468201802c95184f2951d3814a7e0 SHA-1: 4863e6ce0f581aa11ce951c92878860a511232c1 SHA-256: 4320528997cd48bf00cd3444fdfc790034c6d12a9bf039db539c731746da3350
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://ggtraff.ru/aws?utm_term=affidavit+of+authenticity+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5fdacfce31389.pdfIn PDF document text
    • https://wajatajosow.weebly.com/uploads/1/3/4/4/134487766/6c7ba437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5fab82336edcf.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/Niahhhg/6_clues_to_a_theme.pdfIn PDF document text
    • https://saritubix.weebly.com/uploads/1/3/4/5/134507132/lodoxabasag-pepilezodedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_5f93022c5b107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451231/normal_5fd6119f371c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444098/normal_5fc64d71870f4.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/nokiva/tuzijatitubumukarukowaj.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/94823665379.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/91871095094.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/joledanaleve.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/home_inventory_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/47658458848.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/dragged_across_concrete_streaming_free.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_off0000d3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CB 5272 bytes
SHA-256: eabb235be0366c37657e0d5525a173b63b2b1dfa97ec3976a7b0646dd192ddb7
font_01_sfnt_off0000e5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AE 10516 bytes
SHA-256: 1b41e90f35bd9f944cb7d801e561a6511548e956e69873b17c4defa3949a7876

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