PDF malware analysis — malicious · 52e1f33e083c222a

MALICIOUS

PDF

66.9 KB Created: 2020-11-11 08:14:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 734ea7369cca8ba93ab542282b12a62c SHA-1: 2d38ccd196f0f12a0de1fa6118c0f030672245b8 SHA-256: 52e1f33e083c222a127f730fc295f9749d4a5d236ce45fe8cc1212d52d05b07d

214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://cctraff.ru/strik?keyword=blood+pressure+readings+for+women In PDF document text
- https://cdn-cms.f-static.net/uploads/4382196/normal_5f978f0260982.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4401540/normal_5fa679daea873.pdfIn PDF document text
- https://guwopatuzigumi.weebly.com/uploads/1/3/4/3/134334434/sasopenurogotiw.pdfIn PDF document text
- https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/lixuradigitotup_porotijelu_lojolexowepole.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408170/normal_5fab1d72317c7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385026/normal_5f8e5f38dfb5d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4406812/normal_5faa13bdbd012.pdfIn PDF document text
- https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/1ce0597.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412403/normal_5f971306e08c8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366036/normal_5f902dcea0545.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/710621ef-5159-4e8d-a537-f4d7ca4471fa/51963630891.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/34252e6c-74f2-41a4-89f8-f07264b91484/technical_analysis_free.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8b29f8e3-3cf7-4d6f-9544-64cf441643a4/newakogazulurulidegidotu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/129b6200-d7e8-4b37-a280-5843d722106d/cod_mobile_hacks_2020.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_off0000ca26.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCA26	5504 bytes
SHA-256: `e330f502dc9398fdff5302d86ac251a8016d94e1d43953f53abf956d661e78bc`
`font_01_sfnt_off0000dcdf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCDF	9800 bytes
SHA-256: `371cfed6c0a7972be1eaeba148a07d9a3cc23d8a91ec08ee2d95cb5507436b6c`

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