PDF malware analysis — malicious · 0470fb7990e407dd

MALICIOUS

PDF

66.4 KB Created: 2020-12-03 07:48:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 3a5b00d4360781178029e838a7fc09ea SHA-1: d0cbb8b962dff8998400c6830a54d42ff84e8db1 SHA-256: 0470fb7990e407dd3a440a3a59d3b021fdebd4ba73efd0c8d0cd625ca24dd68b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/strik?utm_term=rii+mini+i8+manuale+italiano+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4379220/normal_5f8de165345d4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380082/normal_5f8d9eccf3f87.pdfIn PDF document text
- https://digokevun.weebly.com/uploads/1/3/4/7/134747151/6911389.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366032/normal_5f871ae4d1018.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4471250/normal_5fc87764b92b7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371246/normal_5f8ba7dd1d46d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367914/normal_5f8a86292e3e3.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/32439753-797d-48c2-83e4-05acf26b660e/free_printable_house_lease_agreement_template.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c6400db2-0b42-4693-9a13-989426f3d9c9/90781541879.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_off0000c619.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC619	5112 bytes
SHA-256: `81f3bbee5bfde6342bf4352b30a8759261000e6fa1ff7dc846aa43fae4be1e80`
`font_01_sfnt_off0000d773.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD773	11688 bytes
SHA-256: `488c3be119bbeb898b8dafe5b34ef74de500ab4e9228b6d52adc5b1583318885`

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