PDF malware analysis — malicious · 78aaff4bc0d7c274

MALICIOUS

PDF

58.8 KB Created: 2020-11-10 20:53:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 6c15d071b21b790ba0fbed09f8d544a1 SHA-1: 9c3e96064831c122c710763c4b3053c9cf1c0317 SHA-256: 78aaff4bc0d7c2749a686626438149e85d83704c3206b8b4417fcd499cd83e8d

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an external URI pointing to a suspicious domain, likely intended to trick users into downloading unwanted content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing lure.

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/123?keyword=good+omens+tv+show+free+download+sites PDF link annotation
- https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/malegufom.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382003/normal_5f8e272159cc5.pdfIn PDF document text
- https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/vajos_kosumuwovemifig.pdfIn PDF document text
- https://pusigodumutujor.weebly.com/uploads/1/3/4/6/134610993/4510861.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367621/normal_5f9e179f93ba3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377905/normal_5f953a0ed3fbc.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/f1fb5178-3c51-4cc0-ab61-c4405bab579e/13565265765.pdfIn PDF document text
- https://s3.amazonaws.com/gebukil/57890407290.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/28b95d53-1172-4f04-a566-2774bc9efff4/papyrus_big_christmas_adventure.pdfIn PDF document text
- https://s3.amazonaws.com/dubiditiginowo/chemistry_if8766_answer_key_page_34.pdfIn PDF document text
- https://s3.amazonaws.com/vuraradaso/62443408901.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_off0000aa0a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAA0A	5332 bytes
SHA-256: `e50bbf5944728a95ba117330b7fb9e92488a3363736343da5d614e485a1cfc7c`
`font_01_sfnt_off0000bc17.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBC17	10168 bytes
SHA-256: `db5995b457b23c3adb4cddedfdeef658421af4edc72f8c0c206826e02c338c30`

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