PDF malware analysis — malicious · 702119b3d79cb74e

MALICIOUS

PDF

80.3 KB Created: 2021-09-16 05:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: bce0a5810cd6c0c1fd480dd15131c48e SHA-1: e69f63174f7c41b8c2191c7e0896232d02d59239 SHA-256: 702119b3d79cb74e55684280e7abe76805e39855472351262f5985db2661b719

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating malicious actions.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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://irlanc.ru/uplcv?utm_term=free+online+converter+mp4+to+mp3 PDF link annotation
- http://bundoreh.com/fckeditor/files/file/4398695296.pdfIn PDF document text
- https://madeinstlucia.com/userfiles/files/5883575606.pdfIn PDF document text
- http://spbi.cz/res/file/37249710930.pdfIn PDF document text
- https://karpzbeldowa.pl/uploads/userfiles/files/15453543548.pdfIn PDF document text
- http://boekenwinkelindex.nl/images/uploads/91048288585.pdfIn PDF document text
- https://eownauto.com/uploadpic/files/wojugezabesizubax.pdfIn PDF document text
- http://zanethompson.com/userfiles/file/gasogokijebor.pdfIn PDF document text
- http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/86152525818.pdfIn PDF document text
- http://www.europesolidaire.eu/userfiles/files/zujakexef.pdfIn PDF document text
- https://atamergranit.com/userfiles/file/benabawasurunupegejigeras.pdfIn PDF document text
- http://technoauto.jp/js/upload/files/47609795991.pdfIn PDF document text
- http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/7726444277.pdfIn PDF document text
- https://lederstuhl-shop.de/ckfinder/userfiles/files/60578651877.pdfIn PDF document text
- http://musicandyouapp.com/webupload/editorimg/files/wijusopakewowibozirowi.pdfIn PDF document text
- http://motolargo.pl/userfiles/file/rogugisorifizitarigasi.pdfIn PDF document text
- http://cancercareresearch.com/userfiles/file/suvam.pdfIn PDF document text
- http://zenobiacultura.it/userfiles/file///69203041227.pdfIn PDF document text
- https://ribaczpeter.hu/files/file/72768014877.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c439b77b98---keritozo.pdfIn PDF document text
- http://windmill-bv.com/userfiles/files/burefoxubim.pdfIn PDF document text
- https://geneticapanama.com/userfiles/file/75946295423.pdfIn PDF document text
- https://cytairtool.com/test/userfiles/file/20210907_e11f1.pdfIn PDF document text
- http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16140c52f05f6d---64963713282.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_off0000d747.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD747	17004 bytes
SHA-256: `bbfdcd109b8847ec6b7d86dd95593b25f16a16a1ac17deedab85d4211bfcd898`
`font_01_sfnt_off0001036e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1036E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011b85.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B85	10500 bytes
SHA-256: `9cca8268892a7bb65567d65535dbfc5e9f562444fe627c0698ecbc4902b796bb`

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