PDF malware analysis — malicious · 90a2a4a5cfc23819

MALICIOUS

PDF

71.8 KB Created: 2021-01-02 04:57:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05

MD5: b0e40f8fa38b82cd8d03732157c0f0fa SHA-1: e836f3689345d8becb426e79996077f8724832c6 SHA-256: 90a2a4a5cfc23819f9350280aeb5d79c1b14509ca6b7d97ea5fbceb05ca9287d

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, 'https://trafffe.ru/123?utm_term=skyrim+quicksilver+ore+near+whiterun', is the primary indicator of a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to lead the user to a potentially harmful external resource.

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://trafffe.ru/123?utm_term=skyrim+quicksilver+ore+near+whiterun PDF link annotation
- https://static.s123-cdn-static.com/uploads/4471235/normal_5fed1620547e8.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4389793/normal_5fe5f2b9c534d.pdfIn PDF document text
- https://cdn.sqhk.co/pinebiven/heggKPl/vipopixagato.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409602/normal_5fa89e4d52533.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4467017/normal_5fdda4ccb7869.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4475847/normal_5fc28ccd360a4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4401972/normal_5fb7106950905.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/pobixedele/94199684908.pdfIn PDF document text
- https://s3.amazonaws.com/pegek/91001379726.pdfIn PDF document text
- https://s3.amazonaws.com/purufiz/20724416577.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_off0000dbbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBBB	5588 bytes
SHA-256: `4896d12c6f6cb162fec3f76b4f98a70498f94d0d004b9a01e65c58b28cdce172`
`font_01_sfnt_off0000eeb6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEB6	10488 bytes
SHA-256: `33a39e123d21b71a70c4e5672123c05d1421110650c8d688e2a1e69e379a1216`

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