Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67a315549c2b103…

MALICIOUS

PDF

64.9 KB Created: 2020-12-02 09:45:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6c6a0fbec9ddd3ec6d27a41ccf1488c9 SHA-1: bf091307d48a59e4d7c3472a51ef8aa6bb6d2e37 SHA-256: b67a315549c2b103e6616c273a50c6c9e6d891e9c32da70828abd96ee1acb23f
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/strik?utm_term=weekly+homework+sheet+q3+4+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450511/normal_5fbb004ff19a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464053/normal_5fa642157b836.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/e5bf03a5-c21c-4b0d-a491-3c9b7c6bff4a/19382895798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23582a3a-b7a2-46c8-8693-ccbd56bfc901/tojufejoburilitiniveropu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3350585b-dc93-475f-8803-0c931556ac6b/2413653751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a522ebe-10d5-4c0e-8784-3de0808df97e/duxinenilanowosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8453d112-780f-4725-89ed-1b87d33bdc7f/21055182374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/371efd1b-57ae-4742-9e5c-c1d4a851680c/67171642253.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00874a5bc066edfa0f7a0/t/5fc15473f3de5e49b595eec4/1606505588029/god_and_the_afterlife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33c4af97-a21f-4982-b336-74f143c0269e/5_rights_of_medication_administration_poster.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/detewilibadoma.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf9511af5bf52c3271313/1606220113533/absorption_chiller_schematic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b483ab9b-ea84-4fca-9c45-014ca2a34346/catholic_church_wedding_ceremony_vows.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4C 5576 bytes
SHA-256: d9958205d6ab6085881a252ad5d4b848cd3ee9edde223047f917571b284906c3
font_01_sfnt_off0000d144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD144 11028 bytes
SHA-256: cbede132034aeaf4b7fec2b2bbd5f2080a42d9faa05afdb202065973a6b34550

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