PDF malware analysis — malicious · e646c3bea1816f20

MALICIOUS

PDF

70.7 KB Created: 2021-09-14 12:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 8455e7dd0b9ed75b5d6e57763a927563 SHA-1: 283a9abf63db7b9b93037ff348a774879c80aaff SHA-256: e646c3bea1816f202230411b9860df7a28aff8b7f0d5cfe86f9de3666df3d115

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into decrypting a payload, likely by providing a password for an archive or attachment. The numerous embedded URLs, many pointing to PDF files on disposable domains, further support a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://huntic.ru/uplcv?utm_term=how+to+reset+your+phone+but+keep+everything PDF link annotation
- http://dieukhactransam.com/uploads/files/27611762595.pdfIn PDF document text
- http://daisytalavera.com/userfiles/files/27972921189.pdfIn PDF document text
- https://pomacanthe-art.fr/imagebeforeafter/files/21266460569.pdfIn PDF document text
- https://habrit.tw/ckfinder/userfiles/files/vidifigosoxefalowu.pdfIn PDF document text
- http://chpcentre.com/files/file/vilirowerugije.pdfIn PDF document text
- https://ddmmaze.altruistictech.org/documents/img/upload/files/lamedilenokovibag.pdfIn PDF document text
- https://manenshop.com/upload/files/96857583569.pdfIn PDF document text
- http://bjqyms.com/filespath/files/20210904235241.pdfIn PDF document text
- https://mauspro.net/upload/files/30485865661.pdfIn PDF document text
- http://absolutelyneon.com/userfiles/file/12861271410.pdfIn PDF document text
- https://szabobuszberles.hu/files/files/tuzilur.pdfIn PDF document text
- http://carsonpokebar.com/uploads/files/66016758184.pdfIn PDF document text
- https://turasmobilya.com/img/editor/image/file/71597838856.pdfIn PDF document text
- https://www.rougeindigo.com/ckfinder/userfiles/files/penobiweguw.pdfIn PDF document text
- http://www.pattyn360.com/upload/forum/files/torafupafarexifimar.pdfIn PDF document text
- https://csam-villepinte.org/uploads/images/file/rosimulutusabevexalof.pdfIn PDF document text
- http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/161369a3085f99---tobadobakuz.pdfIn PDF document text
- https://cbconsulting112.ca/userfiles/files/nasig.pdfIn PDF document text
- https://amursvoidom.ru/media/files/fopileriliwobepuze.pdfIn PDF document text
- https://bodymart.in/ckfinder/userfiles/files/90643647121.pdfIn PDF document text
- http://kingsfinancialconsulting.com/userfiles/file/sarogilukizezofeja.pdfIn PDF document text
- http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/sovoreruvexujejeva.pdfIn PDF document text
- http://beganijewellers.com/ckeditor/ckfinder/userfiles/files/vuturelozupepavujedurox.pdfIn PDF document text
- http://entryexpress.online/chapter_images/files/wuzajadetororixixal.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_off0000b507.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB507	15316 bytes
SHA-256: `e3d1c22e302f4a08b92d4478471cdb8f1d7bce64992cc23dc5b7b313eab72a81`
`font_01_sfnt_off0000dbb4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBB4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f3cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3CB	10912 bytes
SHA-256: `d0666915c4b6c6b2205a5118740e5785236cf8bc3ee5db48d6f06facefa9de0b`

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