PDF malware analysis — malicious · b4b54a7ed056b620

MALICIOUS

PDF

76.3 KB Created: 2020-11-22 13:46:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 001bdf8289263de32eec4253c0eb0a23 SHA-1: bd2401aac4b8e44c49e6c0b6bba233416fe434af SHA-256: b4b54a7ed056b62018533a5f0ab7813c83b069ae87352fc0ad7bd9179834ec9b

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be related to academic search results, suggesting a phishing lure.

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://traffnew.ru/123?utm_term=principles+of+macroeconomics+book+answers PDF link annotation
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/napoledunadigo/alex_from_ready_to_love.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fa50b8bf-7e9b-43bf-b238-350e593f039e/conocimiento_teologico_ejemplos.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4e378857-eb21-4276-8c2e-26eaa7207265/71005410638.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0deca8c9-39c0-4a72-8b4b-5b89333380dc/79480741509.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1f634fed-691b-4167-84d7-e546eb534b1c/school_wars_unblocked.pdfIn PDF document text
- https://s3.amazonaws.com/mijedusovineti/administering_medication.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/732a9fc3-70fc-49d7-aaff-64d56050a1c5/kawemegagukifebano.pdfIn PDF document text
- https://s3.amazonaws.com/ribowexulo/1606316341.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a9566ff0-c195-4e06-8abd-f2b61a186bea/33138745069.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/199e3344-e749-458e-aa36-659021a97939/74357552247.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ebe5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBE5	5456 bytes
SHA-256: `cbeb7cbbf8572269e9042e2ef835b6349da45a3f0f5dbfa07ad509c93adbbab1`
`font_01_sfnt_off0000fe6f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE6F	11164 bytes
SHA-256: `3b38a43bd881cb0f2b896c13a17e79e77c4c2fa9afc78656ffaece3feec767fd`

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