PDF malware analysis — malicious · e2c0fd4c44029607

MALICIOUS

PDF

83.4 KB Created: 2021-09-10 02:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 42ef909649a6e7374aa4fdffb6ad4cd1 SHA-1: 1634dab45efe1ecbb7a33df91877a9cf74ae9bba SHA-256: e2c0fd4c44029607dd907ad098f57c8c25bb9b6b95cf838e944569a456e98e9d

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document's intent to trick users into downloading a password-protected archive, a common tactic to evade gateway scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://synerhu.ru/uplcv?utm_term=how+to+open+rar+files+on+android+without+password PDF link annotation
- http://samuiluxurytravel.com/Uploads/file/susatalewilepajokumodi.pdfIn PDF document text
- https://maffart-guy.com/userfiles/file/sagerowaga.pdfIn PDF document text
- http://signauction.net/userfiles/file/tumogufore.pdfIn PDF document text
- https://ifbscalidad.eus/files/galeria/files/kitaj.pdfIn PDF document text
- http://geotersrl.it/file/ziledegelof.pdfIn PDF document text
- https://baoyi-chuck.com/ckfinder/userfiles/files/72207973107.pdfIn PDF document text
- https://lecormier-menuiserie.com/www/upload/files/58770446002.pdfIn PDF document text
- http://www.casasemio.com.br/ckfinder/userfiles/files/38606179148.pdfIn PDF document text
- https://mihalex.by/files/files/98477841987.pdfIn PDF document text
- https://www.willmarshelter.com/ckfinder/userfiles/files/jakagewuruvi.pdfIn PDF document text
- http://uptownchantilly.com/uploads/files/danuxilemimozupev.pdfIn PDF document text
- http://bjqyms.com/filespath/files/20210906030954.pdfIn PDF document text
- http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/misufofobidunifon.pdfIn PDF document text
- https://ost-fogging.com/upload/files/11818248743.pdfIn PDF document text
- http://bsa-billiard.by/images_from_html_editor/file/bagupakarex.pdfIn PDF document text
- https://aluminiosarla.com/userfiles_arla/files/dodobukekirukilejazivupu.pdfIn PDF document text
- http://e-baze.lv/images/site/file/fuvireroro.pdfIn PDF document text
- http://maternites-catholiques.org/ressource/site-image/files/94088432679.pdfIn PDF document text
- http://mim2010.ru/userfiles/file/luxifoxugiti.pdfIn PDF document text
- http://engroupe.ca/aym_image/files/maxigotidipizaj.pdfIn PDF document text
- http://17njl.com/userfiles/files/5882841045.pdfIn PDF document text
- http://brenna-ski.pl/userfiles/file/67691859359.pdfIn PDF document text
- https://doanandieuduong295doson.vn/namthuan/images/news/files/jiwamixejuvijegabowo.pdfIn PDF document text
- http://uptindia.com/newsimages/file///kovolidezo.pdfIn PDF document text
- http://straub-online.ch/userfiles/files/sifurubifebi.pdfIn PDF document text
- http://connectcontrol.net/files/userfiles/files/17365745720.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_off0000de38.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE38	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f64f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF64F	10772 bytes
SHA-256: `9a0304d6aee3fec11c50351e91f271d0c81ef1cf8e20391939a5f1831544ad2f`
`font_02_sfnt_off00010f05.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F05	18636 bytes
SHA-256: `f8862949ba98f46c364363972ce6cc65ed7c0b5c0b4c3304a7df7bd11ca7b28e`

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