Malicious PDF — malware analysis report

Static analysis result for SHA-256 a72043d183c81296…

MALICIOUS

PDF

70.3 KB Created: 2021-02-09 23:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cc2b456a8deafb7b63b22ca43147553c SHA-1: a90a3279ab5a3dc4069c25b2f08b38a46ad9db68 SHA-256: a72043d183c81296dfbaedeb931c297b5089d7e934933c2f06a091a161e7deb7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that directs users to a website disguised as a search result, likely to trick them into downloading further malware or divulging sensitive information. No scripts were extracted, but the presence of external URIs and the phishing classification strongly suggest a malicious intent.

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
  • 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://seumenha.ru/wb?keyword=h%C3%ACnh%20n%E1%BB%81n%20%C4%91%E1%BA%B9p%20cho%20powerpoint%202010 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406456/normal_5ffd730eef1a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5fd7402440aa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411915/normal_6014b53e71f9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456114/normal_5fff15631ba5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459180/normal_6018666461c2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501214/normal_601bbdd9d1803.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448116/normal_5fe3c9fef11f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5fdb53cd8f00f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505820/normal_601faee2cd970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472188/normal_6019f1595ccba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379498/normal_5fd14467874b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413462/normal_5fcbf61823eeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_60198f6d3cea8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383295/normal_5ffaebb7cddaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dagajevefud.epizy.com/catalyst_9400_datasheet.pdfIn PDF document text
    • http://wogurep.epizy.com/82132408354.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_off0000cba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA4 5496 bytes
SHA-256: b3188da5af67ceb38a8b2b8232b44350479a0f231ec6569eeaa4b8e5ed75b851
font_01_sfnt_off0000ddf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF1 20116 bytes
SHA-256: 9372f95c2ad4dd1089ac53bc370ce2e03f81f2594cd4b651851159ccf2eb3032

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