Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8c827ad0cce32b…

MALICIOUS

PDF

60.3 KB Created: 2020-12-18 09:57:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 37bb5211585ccabeaa4e29c70cd13f8b SHA-1: d51f671c7b716dc168575f5db183d3f088ffe08b SHA-256: 9b8c827ad0cce32b08c0184b3bb93392fbf3a200857bc8864f72d5fb0877bc6f
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://ggtraff.ru/123?utm_term=rubber+keyboard+mat In PDF document text
    • https://cdn-cms.f-static.net/uploads/4457311/normal_5fb5c1f93b223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414864/normal_5f9767fb3144c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f8715c53eafc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490529/normal_5fca91e621319.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450504/normal_5fc56aaec5826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425237/normal_5f9df7719a828.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/fekazudabo/waburo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b4dfbe9b6939512bb5cd/t/5fcfc8eea8cbdc2f053bc590/1607452910729/lazadasofip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc535882e34347c706079c8/t/5fcd7ec2fe657040d5a8a3b8/1607302856006/turkce_pop_sark_lar_2020_remix_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/3203967655.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/panasonic_answer_machine_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/warfare_1917_unblocked_6969.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/travel_vlog_background_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/rogue_pvp_specs_wow_classic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc4d1bf8-bbc6-41da-8503-4d380cdf5363/matchington_mansion_cheats_level_1781.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_off0000b525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB525 5072 bytes
SHA-256: 7126adca9271cb8f297ac27e5b98010da9e374fb515f1a65e70a473cb64a5439
font_01_sfnt_off0000c65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65F 8768 bytes
SHA-256: cad550a688a47c65b1ad53e8e0ca00c431f5650a8518fc6cfe990d1807597118

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