Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96e67636282af9e…

MALICIOUS

PDF

73.0 KB Created: 2020-12-04 11:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c88539e73db763c4f2762b689db95838 SHA-1: 5548077dc21c8340d7a1c4c6f6ad2a09769dddca SHA-256: b96e67636282af9ee0b153ad456efe6563147f846366d2d9681f18e8c0323681
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=caedmon%2527s+hymn+translation+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454665/normal_5fa4ae52a44da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416494/normal_5f9501a47bc7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391893/normal_5fba7bd0dddcd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390680/normal_5fc444d00cabb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461498/normal_5fab66349b541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5fbf2352537f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_5fbba08e10caf.pdfIn 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/e76dd59a-760a-4aa5-b9f1-47d8196fec93/bojipid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/776f1dfc-a431-4f19-8e69-0058cad9e00b/lopufefupiwozuvesata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f324472-a0f6-462a-a2e8-0edf76157a8f/triptico_de_enfermedades_de_transmision_sexualidad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/968d1308-7480-403c-ac2f-32d9f6788398/dnd_5e_cleric_build.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1cf359465c722a591fdd/1606229235994/labafosadijiripoxadas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a9bf2f4-1b67-4ed8-a3a2-96805b719e1c/melbourne_tour_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69cbd5e5-b212-4793-956a-b51b8f4921dd/48130503508.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b28ea87939686428f431/t/5fc6dc72788a962b7c1dca18/1606868082576/death_pipe_for_pc.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_off0000defa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFA 5324 bytes
SHA-256: c86921a5f80e1be7bd4c35c9fb13eddf1878a8b0a981fcb5b05ef1869f1b4a8a
font_01_sfnt_off0000f0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 11972 bytes
SHA-256: 22b74ebc5fb2ffb899f756ba8cc5e6a059e244fa905f0d2646640df505aee879

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