PDF malware analysis — malicious · 4acaa5eb7eaea8dc

MALICIOUS

PDF

71.2 KB Created: 2021-01-05 22:00:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: f9a61a5abe35c0bbd752ca7858c014b5 SHA-1: efd769834464aec859b0a86555a54a277010568e SHA-256: 4acaa5eb7eaea8dc82bc413cb9c81d9a0203f513fa576b8c5470e86a269b41bd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious redirection or content delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9883

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://traffset.ru/123?utm_term=rockler+t+track+system PDF link annotation
- https://nagifinapu.weebly.com/uploads/1/3/2/6/132696111/02e05.pdfIn PDF document text
- https://josafobuwevaj.weebly.com/uploads/1/3/4/4/134464642/2157068.pdfIn PDF document text
- https://cdn.sqhk.co/masamiwe/tkT5het/folagatodutawas.pdfIn PDF document text
- https://silagonamep.weebly.com/uploads/1/3/1/4/131452845/54336fee1e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4447884/normal_5fc881d03374f.pdfIn PDF document text
- https://pozimetotekiv.weebly.com/uploads/1/3/4/3/134339641/sapokamotutinu.pdfIn PDF document text
- https://cdn.sqhk.co/zewezerezi/1P8G3Xh/drift_wars_mod_apk_1._1._40.pdfIn PDF document text
- https://ridogorizaloliv.weebly.com/uploads/1/3/4/5/134527302/db2dd.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db30.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB30	5120 bytes
SHA-256: `e436c6ee59cae98053aaa9928658cacdac37f9abfa6a44f2724da401cefbf67c`
`font_01_sfnt_off0000ec93.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC93	10424 bytes
SHA-256: `e5b4dbaae8a2220b96b452dc551cafc8db3f181d1d2e1bae237bcb48ade61206`

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