PDF malware analysis — malicious · 6f855e3b94b44cb7

MALICIOUS

PDF

84.7 KB Created: 2021-03-09 05:05:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: e920e750f798a0830431ef7dcc223923 SHA-1: 251527717e4d56f54c6fbb41e037603402ad8bba SHA-256: 6f855e3b94b44cb77f1fb28abd9ce632b740103dccd5ad5c962ffa163f89e255

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one prominent URL pointing to a domain associated with phishing and malware distribution. Heuristics indicate the PDF is a link farm on disposable hosting, and ClamAV detection confirms it as a phishing trojan. While no scripts were directly extracted, the PDF structure and external link behavior suggest it's designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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 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://lozipotod.ru/award?keyword=class+11+biology+practical+book+pdf+download PDF link annotation
- https://leniwexobopusez.weebly.com/uploads/1/3/4/7/134713406/3815193.pdfIn PDF document text
- http://fetawedigenavab.22web.org/os_generos_literarios.pdfIn PDF document text
- https://walikuroxora.weebly.com/uploads/1/3/2/8/132815001/dopebaminezapolemaf.pdfIn PDF document text
- http://maripifedama.22web.org/tenumogulukobavilimini.pdfIn PDF document text
- http://dusosax.66ghz.com/pijisujewapi.pdfIn PDF document text
- https://najigojuvunijo.weebly.com/uploads/1/3/0/8/130874658/jenasev-jodaje-tuwurivozipira.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/kexamoxusinixu/ditok.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/30b2ac29-cb30-4bb9-9476-0567e9aa3ebf/37213277408.pdfIn PDF document text
- https://s3.amazonaws.com/zurovajij/92295616292.pdfIn PDF document text
- http://finuponazed.epizy.com/the_dream_of_a_common_language_amazon.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ee2b76de-887e-4398-ab1c-8a7a2b70e445/xaxugomufusinobened.pdfIn PDF document text
- https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_229a1f7a265b42c8b4a61f9d13458d0c.pdf?index=trueIn PDF document text
- http://nekaxikafixof.epizy.com/54589404441.pdfIn PDF document text
- http://tumuxisirawev.rf.gd/contoh_report_text_kelinci_beserta_generic_structure.pdfIn PDF document text
- https://0c2a7d7b-be9d-4ef2-a94c-09ca905cc17d.filesusr.com/ugd/7d21c0_58bb8f87602b45b680b86d73a5adb4d8.pdf?index=trueIn PDF document text
- https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_da867c34ed224367bb359604326801e7.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/6ce90a6a-80ce-4021-883a-7eacaa5d6e9e/cyber_security_course.pdfIn PDF document text
- https://6c892e0d-5736-4b4a-96a3-cd490fd1fe3d.filesusr.com/ugd/1407cd_3c479dbf924444f5896da679ae2e28f6.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/kalanejaxutilif/how_to_check_ageing_report_in_tally.pdfIn PDF document text
- https://s3.amazonaws.com/jenisozazewubo/10451761736.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f6bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6BF	5464 bytes
SHA-256: `5cebc5233e63ef369c32f18c4f1d8fe7f19f02525c921ee739378e9af7c3fd4d`
`font_01_sfnt_off00010971.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10971	2116 bytes
SHA-256: `8db65adc699bed2ed4e99b174e414cace916d9ae25f4e5597e3d94de4d1667c8`
`font_02_sfnt_off00011319.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11319	10424 bytes
SHA-256: `7e8976d78a72fcc12c46f32c6b95a1f93565af553c8e5de9d6c40df772788c13`
`font_03_sfnt_off000136b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x136B1	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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