Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dda1d3d60c84e65…

MALICIOUS

PDF

73.9 KB Created: 2021-01-08 22:28:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0a9efd67d249bcbdbc526528414b6c7c SHA-1: bfcdacc4fbaacedd25d707f675cf6c3eca469cf2 SHA-256: 5dda1d3d60c84e6582d173632e5b5b3abdc06fd4af7b82140b7fd0b4b3b9c771
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://gettraff.ru/123?utm_term=hate+list+pdf+ekladata In 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/a118a071-c362-4d36-98f1-36df14662bd2/zepalaxiboxutased.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f673737-8e09-4e70-94cd-99a39dc69d6a/crepusculo_docero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff68b02c-26f6-4f36-bd72-85a42478ab5a/joramutakulajozizuzowet.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/guide_to_crystals_properties.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7666649-4dd2-483a-9357-056cab3a01eb/kadunefatizugudujonadeve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f88a625a-6219-4320-ac4f-02480ddd778d/tikazutosemexaborizif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffcc2c1b-f3b2-4702-b38a-c94b78df0309/20891761419.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/juxazemozanukixegoliwuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401026bd-39dc-43ad-b0cc-385adec1d07c/medical_surgical_nursing_lewis_10th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13d5d636-8980-480d-8ac8-2447a8e81179/rivevigedigimimez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49063ed-dc2c-4dda-a51d-9f95dfa0c851/fipetalifizoxizuxowapuvug.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/nixusedilobidipaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b181d3-01ff-4408-86a6-7ab7920c0edc/71536357174.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_off0000e66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66A 4964 bytes
SHA-256: e6449401900c491c9c1eee32fbf0f8e4fa51aeae36a7b4376687627d005924ce
font_01_sfnt_off0000f764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF764 10580 bytes
SHA-256: 7d3df801528c3674c9bbc112b272df2859c6c018cd1a4c2a5166195601b0cc44

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