Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4d3f24a45ea535…

MALICIOUS

PDF

61.1 KB Created: 2020-11-20 09:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bd3e4e54ce32b497186e29475a22180c SHA-1: 11bf189da031da8a648b1bedece5e13a5533b3be SHA-256: 9a4d3f24a45ea535f3e9282bb3779ef89af43723b6eedac2024b1b02fac2949f
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 0.9996

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=unit+8+right+triangles+and+trigonometry+quiz+8-2+trigonometry+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388279/normal_5f9466cf92603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5f89f5e63b9e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_5f98f8a37a64d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f942103c99b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375907/normal_5f985ca0e651f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382793/normal_5f8ed176cfc03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_5f99b044d94f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405195/normal_5fa495cdc3a1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5f8b4aa03332e.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/takeju/ap_psychology_unit_8_practice_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd8cd44-df08-4f3c-b28a-3228ec0d5f60/zipajajuvavexewanano.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/82864062283.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/xumavexitapirimeselataxef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b8a5b99-f822-488e-b9a4-05d56e8795de/restocking_guide_neopets.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_off0000afa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA5 6024 bytes
SHA-256: 692e339e30ceccea835082c2f4cbe7be7d3dd1e0c70333dc39e53b33a8b6e8fe
font_01_sfnt_off0000c414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC414 10288 bytes
SHA-256: ab1d2c991028ac35e5d0ce89c785d461390fc6e67ada3cff51695d0dd6bf929b

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