PDF malware analysis — malicious · 48d31435d1f1afaa

MALICIOUS

PDF

71.7 KB Created: 2021-09-17 17:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: a2456869d2c21dc51a41b54910919aee SHA-1: 918a555ef9d2167e1c815350ae5d2fddaf01e55b SHA-256: 48d31435d1f1afaa8364a42fcf1197b646cd23a9ee6238ddfee85dc62502e16a

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, many pointing to potentially disposable domains, suggests an attempt to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm designed for SEO manipulation or traffic redirection, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 http://www.firengo.com/userfiles/files/fuditeme.pdf In PDF document text
- https://gcr.goldcrownresort.com/magazine_files/files/rawabuwixifipu.pdfIn PDF document text
- http://cka-shiba.com/ckfinder/userfiles/files/60943163448.pdfIn PDF document text
- http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/42647288654.pdfIn PDF document text
- http://3asoft.vn/img/files/71358934466.pdfIn PDF document text
- http://vamaconsulting.sk/userfiles/file/81995925915.pdfIn PDF document text
- https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/aa40e8a7f7445ed06560570223a36b34/dovusasemopuzipadaporot.pdfIn PDF document text
- http://sineadstone.com/userfiles/file/79844326.pdfIn PDF document text
- https://raiporjai.com/piceditor/file/66795549054.pdfIn PDF document text
- https://borgopitti.it/userfiles/file/37317349475.pdfIn PDF document text
- https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161419c3b6ff2c---tolewadoxalof.pdfIn PDF document text
- http://carsonpokebar.com/uploads/files/nazafivuvikebetikuros.pdfIn PDF document text
- http://ellissi.org/userfiles/files/15032353241.pdfIn PDF document text
- http://tlw.ro/UserFiles/file/nujuriken.pdfIn PDF document text
- http://uptownchantilly.com/uploads/files/42797412611.pdfIn PDF document text
- http://silesiacapital.eu/data/file/xeperavusagewunalojako.pdfIn PDF document text
- http://elsped.hu/files/file/99870716749.pdfIn PDF document text
- http://fisioterapiasuzzara.it/userfiles/files/92328190066.pdfIn PDF document text
- http://idevicesplus.nl/app/webroot/files/userfiles/files/4827638023.pdfIn PDF document text
- http://gold-carsales.com/js/upload/files/bofulapasisirilozina.pdfIn PDF document text
- https://hnhaa.com/userfiles/tnejp/files/dojapun.pdfIn PDF document text
- https://senarathgroup.lk/assets/media/file/55668791095.pdfIn PDF document text
- https://fuoriscena.eu/file/47620081664.pdfIn PDF document text
- http://xn--b1akwe.xn--p1ai/userfiles/file/lusojov.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=scert+books+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_off0000b280.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB280	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ca97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCA97	10516 bytes
SHA-256: `9e2a0080364ee09c1c90ee9ecbb6c20b2622de1144744573190fef2ef65b40b9`
`font_02_sfnt_off0000e269.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE269	18180 bytes
SHA-256: `6babd83dc25e82830f26555e90e675ba581b750571edf290792bddfb54a5d499`

Open this report in the interactive analyzer, or submit your own file for analysis.