Malicious PDF — malware analysis report

Static analysis result for SHA-256 52507cf2f9b5d368…

MALICIOUS

PDF

75.3 KB Created: 2021-05-31 12:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cf3e2b7b80cc5b14a1564db8fbb02652 SHA-1: e78501be79bb341096936853d91124c8893ff471 SHA-256: 52507cf2f9b5d368d4ccae87fe24a7750a50790e71782354541a6971e4c4303d
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://vilenefex.ru/123?utm_term=jaguars+injury+report+week+8 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448343/normal_5fd8b92314f50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379032/normal_606dd597e1cb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446790/normal_60600966cdabb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444102/normal_5fddfcea7bc61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_602244e4b3187.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368751/normal_5fdca8638e431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_600bffd254685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485714/normal_60466a65828a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467612/normal_601d2c8350e62.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/4bc8431a-618c-4357-bc3b-0835b51d4dbb/del-ton_ar-15_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f73df918-1549-424c-a7ba-9bf05678ddaa/zogipinabirikajes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa113365-2e07-4529-85ad-f168c81d6f80/lady_of_the_lake_hospital_walker_la.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d887b4e8-4b7d-4ce1-a690-240d35a4a871/85073933091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a365e7-f42e-416a-ac60-09a8dcf76262/93844585447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/546fb594-7a1b-4a89-a841-a9f8dda1f278/signature_2000_elite_lawn_mower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff82482e-088c-4327-a32a-69a4375363c5/xopuwivozefejemafat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3867180-5d89-4c43-8797-d37f7d9224ea/how_to_connect_polk_soundbar_to_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcccad6e-8224-4f9f-a539-b9d29ba751aa/theseus_x_minotaur_hades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f7c482c-e668-4e9e-b9a2-1bb9c7e09dce/62359360896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6c61cae-494f-4027-9df8-fc297985ed21/93011283531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e92dd721-9659-4058-8423-a0cae64abd15/98928841776.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_off0000e983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE983 5472 bytes
SHA-256: 1df64825c0c92dacf949fbcaeada70aabe63f56f8737684a01e7adf99462dee3
font_01_sfnt_off0000fc4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4E 10500 bytes
SHA-256: 021c1db851a17b8336624a5509e253dd1fedecf70c1d4b5ea549e2fb4a75377b

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