PDF malware analysis — malicious · 452f8bb999fb226c

MALICIOUS

PDF

75.6 KB Created: 2021-09-11 05:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: ec17f30499c56acce03fd3830f9e5495 SHA-1: 687a1c90abbd103652f5a77c5e711694a4f644b2 SHA-256: 452f8bb999fb226ccd927b827dc3614cf365d950e85973d95a0fa112aa1e1b17

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URLs, including one pointing to 'garglob.ru', suggests the PDF is designed to lure users to malicious sites or download further payloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the phishing or spamming nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 0.9948

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 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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://garglob.ru/uplcv?utm_term=1v1+lol+unblocke PDF link annotation
- https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613894a192b78---55645541506.pdfIn PDF document text
- https://www.alugutader.fr/ckfinder/userfiles/files/nexoze.pdfIn PDF document text
- https://paperland.bg/uploads/file/56284872293.pdfIn PDF document text
- http://www.alex-vasilkov.ru/images/wisdom/file/22192363922.pdfIn PDF document text
- http://konsultacjenaukowe.eu/Upload/file/8489713390.pdfIn PDF document text
- https://pakianco.ir/data/image/uploads/news/files/15265027405.pdfIn PDF document text
- https://archielectronics.com/userfiles/files/kapezi.pdfIn PDF document text
- https://conexusinternational.com/ckfinder/userfiles/file/23325708460.pdfIn PDF document text
- http://hoanggiaphatstone.com/upload/files/97573105169.pdfIn PDF document text
- http://asztalosweb.hu/userfiles/file/zubunepufafumapem.pdfIn PDF document text
- https://laundrybyconrads.com/nbloom/fckuploads/file/dulus.pdfIn PDF document text
- http://tupnate.com/ckfinder/userfiles/files/82090747765.pdfIn PDF document text
- https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/6a363715aa3fb5434dca38d2978ec018/vawaripovafozominuwajom.pdfIn PDF document text
- http://ginzaramen.us/uploads/files/vogesevigitefufif.pdfIn PDF document text
- https://www.asoriofrio.org/ckfinder/userfiles/files/76786343336.pdfIn PDF document text
- http://www.jobibon.com/admin/userfiles/file/xisufufawizitu.pdfIn PDF document text
- http://globalfeedindustry.com/upload/files/fezofuwupiwerewuvege.pdfIn PDF document text
- https://lifecareproduct.in/ckfinder/userfiles/files/66909134556.pdfIn PDF document text
- http://www.jucadent.es/ckfinder/userfiles/files/jeguvada.pdfIn PDF document text
- http://trieuduong.com/images/Download/66067613367.pdfIn PDF document text
- http://kalkulacka-hypo.cz/userfiles/files/fulekusurimawena.pdfIn PDF document text
- https://www.hemingway.bg/app/templates/js/ckfinder/userfiles/files/38551165966.pdfIn PDF document text
- https://khoahoc.timviec365.com/picturesfiles/kozokebaduw.pdfIn PDF document text
- http://s250801404.onlinehome.fr/img/uploaded/file/widereza.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c6c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6C2	17172 bytes
SHA-256: `1e49bd30e41b04bb62a0063b5f2581b48da97a542842606bb180d912aedb3bfa`
`font_01_sfnt_off0000f2e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2E8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010afe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AFE	9956 bytes
SHA-256: `4cc4bac7f227d06a68b74bd4d9e9ce8308e2ab9f09df3dd3d42ec01343470f94`

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