PDF malware analysis — malicious · cab603d807269d2f

MALICIOUS

PDF

76.0 KB Created: 2021-05-02 21:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 4aae5530075a4bbeb5f4ed014d9c6604 SHA-1: afb6c54959328461d1d49c8539269678b57316ff SHA-256: cab603d807269d2f34fa7e29fc90f0dc13d2121ce2acd48fc2d85d6bc7e6b46f

186 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 0.9996

Heuristics 6

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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://xezojetit.ru/strik?utm_term=how+to+play+catan+expansion+seafarers PDF link annotation
- https://wifonofiwi.weebly.com/uploads/1/3/4/6/134636358/xibojeri.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4391009/normal_5ffc8a7bef9ca.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4421957/normal_5fdff8909bffc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456143/normal_6061aa1a0180a.pdfIn PDF document text
- https://mapupuvegov.weebly.com/uploads/1/3/4/7/134712300/3496510.pdfIn PDF document text
- https://mepubigavij.weebly.com/uploads/1/3/4/5/134599646/b352873228a4ff.pdfIn PDF document text
- http://parovosi.mygamesonline.org/80658879652.pdfIn PDF document text
- http://contarinihome.com/difference_between_qualitative_and_quantitative_research_with_examplesbfzjm.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4496816/normal_60086b3f7a85e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405186/normal_5fd1f0193d900.pdfIn PDF document text
- http://zowogusatutojus.mywebcommunity.org/asme_b31._1_free_download.pdfIn PDF document text
- http://sadovik.me/android_phone_booting_in_safe_modezzhd4.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://biwefejiza.myartsonline.com/arquitectura_de_software_libro.pdfIn PDF document text
- https://s3.amazonaws.com/woneketelak/limozajanixurogosigef.pdfIn PDF document text
- https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_055f2fbffb094d4098460c07628487a2.pdf?index=trueIn PDF document text
- https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_2e8e0eb0c7bc4ffeabe99d4054651c3d.pdf?index=trueIn PDF document text
- https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_81e8bf4a05d943e39c1ba8a5fd724833.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/davawina/subway_surf_hile_cretsiz_indir.pdfIn PDF document text
- http://matewedidoxeber.onlinewebshop.net/finance_and_accounting_glossary.pdfIn PDF document text
- http://nogafojomor.onlinewebshop.net/48036856297.pdfIn PDF document text
- https://s3.amazonaws.com/salade/pipejalijinabegi.pdfIn PDF document text
- https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_8514511cfd774e2abb177a4cc4502dbd.pdf?index=trueIn 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_off0000ec60.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC60	5232 bytes
SHA-256: `eaf241d71fb77f48c0c0b2b904dc5409df69fc614f76bee26b9fb4079c545e96`
`font_01_sfnt_off0000fe57.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE57	10568 bytes
SHA-256: `d480e85ed4356b81820f7854dc7dba6a610bd9922f18230ac4c197dbc1f14d20`

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