Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0959b8b62b4404…

MALICIOUS

PDF

61.9 KB Created: 2020-11-28 01:06:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fdc03195e23daa0a09cfa405bdd637bc SHA-1: df5b22e76073c0415382237e6198b0f379f3153a SHA-256: 9a0959b8b62b44042501538a9206b48784c6e752256634e3e0f5a81bb4fef5f8
96 Risk Score

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 0.9996

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
  • 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://traffset.ru/aws?utm_term=ielts+sample+answer+sheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417049/normal_5fb614444433d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371023/normal_5f933f5b8589d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394060/normal_5fa77fa60d4df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467017/normal_5fc07e40c259a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425255/normal_5fa29f6923b5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373516/normal_5f9995e4d08a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470231/normal_5fae6aff93023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479441/normal_5fbd43d6435f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f8aaa3a438d4.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/8e04c721-2335-4e0d-af9d-604f8ac723d9/caisi_bridge_module_technical_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/magaxilejedidumedu.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/3095190202.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/nixazazepebebikalezime.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/solving_equations_and_inequalities_answers.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_off0000b483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB483 5312 bytes
SHA-256: fd08d5d198bd54b02cc951822174dd100f6c874ad9f60d2de888d6a875167442
font_01_sfnt_off0000c677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC677 10728 bytes
SHA-256: b0088485634ef517be342b1bd7ebc50cd9da5b52c3023d19d97c582e7b8e4941