PDF malware analysis — malicious · 332228049b8f5e89

MALICIOUS

PDF

81.1 KB Created: 2021-09-08 18:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 026c93a30dd2a88f230ba9b9acb0772e SHA-1: b0908a8c236a9611803234ba0e7695db4f9095d5 SHA-256: 332228049b8f5e8910afba18070ef18471406937eccbaef22819563fb247d693

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many pointing to disposable domains, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely used to facilitate the download or execution of a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://jvlegacyhomerepairsmd.com/nbloom/fckuploads/file/fomazoweluwokewidusafeto.pdf In PDF document text
- https://hmradiatoriai.lt/images/files/25604049307.pdfIn PDF document text
- http://techmechengineers.com/uploads/70849614074.pdfIn PDF document text
- https://shevtsov-art.com/uploads/files/fizesen.pdfIn PDF document text
- http://www.asiacoservice.com/file/files/dodofivaje.pdfIn PDF document text
- https://armenia4d.com/contents/files/78882836117.pdfIn PDF document text
- https://granitabrasive.hu/editor_up/24393956720.pdfIn PDF document text
- http://modulobase.com/userfiles/file/1569717999.pdfIn PDF document text
- https://meesens.be/KrMee/Tekstverwerker/45115689597.pdfIn PDF document text
- https://charlesstreetvideo.com/userfiles/file/pumixevexomovolizi.pdfIn PDF document text
- http://gustosandvic.com/ckfinder/userfiles/files/vesodaj.pdfIn PDF document text
- https://themalc.org/files/file/26660222038.pdfIn PDF document text
- http://nirmalamathachurch.org/cms_uploads/image/file/81293871366.pdfIn PDF document text
- http://jagdrevier.hu/upload/images/file/35285137033.pdfIn PDF document text
- http://garage-ys.info/js/upload/files/tinuxopapejumugok.pdfIn PDF document text
- http://aallergy.netlovestories.com/upload/files/xopojajemafopejig.pdfIn PDF document text
- http://ohxto.com/uploaded_files/userfiles/files/pajawovigax.pdfIn PDF document text
- http://laatuwhuisweerstralen.nl/upload/file/pusureb.pdfIn PDF document text
- http://webminmax.com/userfiles/file/virowugemopanoduvevav.pdfIn PDF document text
- http://secretinvitation.net/images/files/98282048060.pdfIn PDF document text
- http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/161378fc1b4380---53049172181.pdfIn PDF document text
- http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/jufepoleronedurupofen.pdfIn PDF document text
- https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e99bddc2ec---53259669496.pdfIn PDF document text
- http://yuemeism.com/uploadfiles/files/26006282886.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=michigan+tax+exempt+form+pdfPDF link annotation
- 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_off0000d8c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8C5	10948 bytes
SHA-256: `2ffe1ab75975f01c101cfbe74baa3d82f4fff3228657e3f4e8669c02e849c074`
`font_01_sfnt_off0000f1c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1C6	17160 bytes
SHA-256: `c65daaac4d0cb1db9fed9ee509067d44183114f47505a9f35028065bc09b5975`
`font_02_sfnt_off00011e8e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E8E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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