Malicious PDF — malware analysis report

Static analysis result for SHA-256 b84d4c885d11852b…

MALICIOUS

PDF

62.4 KB Created: 2020-12-20 19:37:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ba4da3f12015eca253745a8e3353b244 SHA-1: d6f44904195543d430f7d6ad6081a938fa1635c2 SHA-256: b84d4c885d11852bec1ce240c57e97d3e48ee2334163e41670956c5c7eebb972
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://trafftec.ru/strik?utm_term=men%2527s+wool+vests+with+buttons PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490930/normal_5fc8198bcc8a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446165/normal_5fca9f74b4f2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415046/normal_5f9b8b350a2fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f899a65411c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5fa147205e8e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489976/normal_5fd6dea9e6b1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447280/normal_5fc9696d6393c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470402/normal_5fb5a1007b496.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/7b15d771-e33d-44f5-afa8-a32412730afb/devogifokabuvaketivuto.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/set_me_as_a_seal.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/21386945975.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_off0000b800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB800 4796 bytes
SHA-256: 21a89dd49bc819ba0765e9dcd4b0fe6dd781472ec00123c3266e061a4b3ac2e2
font_01_sfnt_off0000c878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC878 10780 bytes
SHA-256: 4228ce0f0173690d98a84672136402d37dce2c741aadd61e029f9163b8fdaa8d