PDF malware analysis — malicious · 616e6f47408f62ad

MALICIOUS

PDF

80.1 KB Created: 2021-09-16 00:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 538932f5ad9b8d87023dab9152f72057 SHA-1: baa7bb03dfe42d6f07649125b69f9f766012fc00 SHA-256: 616e6f47408f62ad0a619f30baa39845e6fe6e0fdeb6b08255b41186b6744c6a

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous external URIs and is described as a link farm on disposable hosting, indicating a likely attempt to lure users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users, aligning with a phishing or malware distribution attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://archism.ru/uplcv?utm_term=talking+tom+superhero+game+online PDF link annotation
- https://cairparavel.ro/app/webroot/files/userfiles/files/88577291914.pdfIn PDF document text
- http://gdwtechnology.com/fckeditor/file/guvobunazijifek.pdfIn PDF document text
- http://cerezolorente.com/files/cerezolorente/_repo/file/75722277034.pdfIn PDF document text
- http://merlegdoktor.hu/tmp/42679400442.pdfIn PDF document text
- http://xn--989ap7r0xbd5x.com/upload/fckeditor/file/22676738601.pdfIn PDF document text
- http://mdknoodles.co/uploads/files/56026565556.pdfIn PDF document text
- https://anyimaker.com/upload/users/files/89498803709.pdfIn PDF document text
- https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/sedem.pdfIn PDF document text
- https://fiberglasssupplydepot.com/userfiles/files/fulukabetuzuxodapifubojuw.pdfIn PDF document text
- https://5uempat.com/contents/files/tulapapi.pdfIn PDF document text
- http://expertworker.paraleumarian.ro/app/webroot/files/userfiles/files/xobemixatolodo.pdfIn PDF document text
- https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/58808152536.pdfIn PDF document text
- http://digitalqwerty.com/ckfinder/userfiles/files/55600977886.pdfIn PDF document text
- http://rootbeadmill.com/upload_fck/file/2021-9-7/20210907100005479231.pdfIn PDF document text
- http://grandviewcommunity.com/userimages/21876851373.pdfIn PDF document text
- https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5c81bde7d---72558702075.pdfIn PDF document text
- https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161423f3d2947c---jazavadowewixijotujute.pdfIn PDF document text
- http://eros-arena.de/eros/userfiles/file/27677621779.pdfIn PDF document text
- http://studioturina.com/userfiles/files/73562887174.pdfIn PDF document text
- http://keralabiblesociety.com/fck_uploads/file/88769291118.pdfIn PDF document text
- http://teleserviciomalaga.com/ckfinder/userfiles/files/70664176815.pdfIn PDF document text
- http://gintaras.cz/userfiles/file/bidogikowesota.pdfIn PDF document text
- https://esterkins.de/ckfinder/userfiles/files/vezojubitu.pdfIn PDF document text
- http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/xozebegujowe.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_off0000d429.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD429	10856 bytes
SHA-256: `d73f9f30a13686f25d069974fd7ba884d8f89dac211287871e6238f6e55ea549`
`font_01_sfnt_off0000ed0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED0B	17696 bytes
SHA-256: `47f0793e0637ab59a13ffa6369692fd06eaa91c2ea2d887921d956830b5d1d11`
`font_02_sfnt_off00011a4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A4F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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