PDF malware analysis — malicious · 27fb7e8f6200f5b8

MALICIOUS

PDF

78.4 KB Created: 2021-02-18 12:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 04f03408d964d0f2ab227a74cc0c629d SHA-1: 3bb2acedc5b94f8e46608397cbefa287684d574a SHA-256: 27fb7e8f6200f5b8ea2dc0ebcbcfd8a11b3932e4e81fa613509dcb23fc3401b7

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. The embedded URL points to a suspicious domain, likely used for phishing or to serve a second-stage payload. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=samsung+galaxy+s4+mini+gt-i9195+datenblatt PDF link annotation
- https://cdn-cms.f-static.net/uploads/4414500/normal_6018c5eaaf98d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403140/normal_6019ac32879eb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500187/normal_60223133926de.pdfIn PDF document text
- https://cdn.sqhk.co/kewesowovim/QiiihwJ/tunein_free_app.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4503874/normal_5ffd82ea1354e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4498882/normal_6008eb785f23b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4471688/normal_5fc6d931be403.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/wulagisi/black_chickpeas_nutrition_information.pdfIn PDF document text
- https://s3.amazonaws.com/bokofapig/96056316698.pdfIn PDF document text
- https://s3.amazonaws.com/tanapilamaxi/aoac_methods_volume_2.pdfIn PDF document text
- http://mezanemuwagoso.rf.gd/spongebob_games_no.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_off0000f4b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4B7	5916 bytes
SHA-256: `0902c1e3a8edab3d5026f259104fbda01f944345af4c07535098cdc341a8039d`
`font_01_sfnt_off000108e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108E3	10388 bytes
SHA-256: `82af46cc0ab5b79f302b9edaf6ddb0fe5ca0698375bb17435995f8a22b33971e`

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