Malicious PDF — malware analysis report

Static analysis result for SHA-256 77b9cac8118cd947…

MALICIOUS

PDF

61.5 KB Created: 2020-12-01 01:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3a6626c20ff3c2d4062a9540c504283f SHA-1: d6b71877a3045c17d3c3677e128250802f66d259 SHA-256: 77b9cac8118cd947c41a3a95d9c36b2954d775551397377eda47400ae70a2072
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 0.9995

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://trafftec.ru/strik?utm_term=pittsburgh+port+authority+app PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5fa1ee122728d.pdfIn PDF document text
    • https://nirilixurem.weebly.com/uploads/1/3/4/4/134474770/d7d1af20a0fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415300/normal_5fbaa666cc02b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481166/normal_5fb5538f01eb5.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/7649ba2c-467d-4dff-a97c-556bbac43331/chakravyuh_2012_movie_480p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a2e015d-e8b4-4212-824b-6c3e8aa0d346/kofava.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/57385632944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a1a7da-e30f-4679-a03d-12491bff7ab5/21962725183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4accee8c-d0aa-4cac-82db-7cae15907896/xugidemozozos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4443cc1c-a4d6-4c6f-85aa-93793b25079b/hello_neighbor_android_download_apk_2019.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_off0000b23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB23E 5292 bytes
SHA-256: 407662a298544319177f7c91ade5c561c6d4b285d0436ed822c26eb1477e1388
font_01_sfnt_off0000c43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC43E 10948 bytes
SHA-256: b459785d3535b034e3809168cf1ee6c8d6375a17007946caddf8d9f5f60eaf27