PDF malware analysis — malicious · 8369d5fc285f5f6f

MALICIOUS

PDF

80.3 KB Created: 2021-09-23 03:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 7dc9042a314f9b415d13015c7b8214ef SHA-1: 9e1f975f15940b2d8247ebd49a4bc245ec0020a2 SHA-256: 8369d5fc285f5f6f636e4891a27e8902167434285bd5816936eab78a60b7d033

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded links point towards an attempt to redirect users to potentially harmful external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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://synerhu.ru/uplcv?utm_term=gta+iv+mobile+official PDF link annotation
- https://cristalparkhotel.com.ve/ckfinder/userfiles/files/87315892654.pdfIn PDF document text
- http://marikitaberbagi.com/userfiles/file/pagowum.pdfIn PDF document text
- http://cameragiaminh.com/upload/files/6238468278.pdfIn PDF document text
- http://sbnjl.com/userfiles/files/11576616072.pdfIn PDF document text
- http://vipforiraq.com/userfiles/files/65887894967.pdfIn PDF document text
- http://kaies.net/upfiles/210908191228293712zeyjax.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/52d73ea8b83d6d1f32258911bf383846/rudikesewakatarodenu.pdfIn PDF document text
- https://alkirbilaw.com/userfiles/files/79252782061.pdfIn PDF document text
- http://hospitalityroyal.com/upload_files/file/63617175521.pdfIn PDF document text
- http://ambulatorioveterinarioilprato.eu/userfiles/files/38833990677.pdfIn PDF document text
- http://musicpark-live.de/userfiles/file/94788475823.pdfIn PDF document text
- https://minhkygroup.com/luutru/files/4869947098.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136c1a1a83dd---zilubiforazumapisoda.pdfIn PDF document text
- http://belovosushi.ru/files/xekutawoxixuzafagomubof.pdfIn PDF document text
- https://consultemergingmarkets.cubsindia.com/files/nurinibivutivitir.pdfIn PDF document text
- http://palmdale.thepokeluau.com/uploads/files/33266688854.pdfIn PDF document text
- http://sualpturizm.com/userfiles/file/vawelezekiwe.pdfIn PDF document text
- https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/38069271731.pdfIn PDF document text
- http://ih-consultant.com/ckfinder/userfiles/files/leneperonikatikimuvu.pdfIn PDF document text
- https://rentcar888.com/uploads/files/202109121301525761.pdfIn PDF document text
- https://rainbowprinter.com/app/webroot/files/file/zoxibezilogapenunulokuzi.pdfIn PDF document text
- https://guijek.com/userfiles/file/44805881964.pdfIn PDF document text
- http://atamergranit.com/userfiles/file/nanijabopesidelovoguf.pdfIn PDF document text
- http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/50581252914.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_off0000d725.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD725	10372 bytes
SHA-256: `6a9acc2921f9048d0fb79bf96d5e4020cfe828020bc8266a79948d23f072a2ea`
`font_01_sfnt_off0000eeae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEAE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000106c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106C0	17384 bytes
SHA-256: `b17e530235d55fbb59ea4a1501301a22952f42270f177a4505d44e70b2093d44`

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