PDF malware analysis — malicious · 76705853429be087

MALICIOUS

PDF

87.5 KB Created: 2021-09-18 23:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 833ce460d6af28a7bed086b0d46d4027 SHA-1: 35e9a187d4d17e56900d0a8043c95691d2753423 SHA-256: 76705853429be0870a582d31d4a565da81648eba1496671c174289dc9b85d79a

174 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high density of external links, many pointing to domains that appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The PRC/3D content is also a known vector for exploitation in PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

Heuristics 7

PRC/3D content in PDF high CVE related PDF_PRC_3D

PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
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 https://chcial.ru/uplcv?utm_term=komodo+yacht+charter PDF link annotation
- https://gulfsupremesa.com/ckfinder/userfiles/files/68935412171.pdfIn PDF document text
- http://kerekagy.hu/UserFiles/file/71152553741.pdfIn PDF document text
- http://techniq.ae/admin/uploadfiles/file/93400972751.pdfIn PDF document text
- http://fonnepal.org/userfiles/file/raxigeporaputun.pdfIn PDF document text
- https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16133416e473b1---97835748979.pdfIn PDF document text
- http://bjerkelunden.org/content/files/userfiles/file///nigebuzuvulipuju.pdfIn PDF document text
- https://promaxsuspension.com/csmimage/file/mevaxosakotapakituf.pdfIn PDF document text
- https://fgcrubochi.com.ng/ckfinder/userfiles/files/vojitotekokowezosinis.pdfIn PDF document text
- https://highlander-inn.com/assets/userfiles/files/789815213.pdfIn PDF document text
- https://kermanrooz.com/img/files/debadujebum.pdfIn PDF document text
- http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/mononenugakijuxuzogipa.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/pu2dlidmgse3ktsm1fekd6d0s3/42242380224.pdfIn PDF document text
- http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/wajuririsumosi.pdfIn PDF document text
- http://dezmaster.com/userfiles/file/xunebesonogapis.pdfIn PDF document text
- http://warehousetraining.ie/images/5602098933.pdfIn PDF document text
- http://ufcnagykanizsa.hu/userfiles/file/66172503428.pdfIn PDF document text
- http://nationshield.ae/userfiles/files/fevegex.pdfIn PDF document text
- https://trsoftyazilim.com/genelresimler/file/71469870189.pdfIn PDF document text
- http://agedwedfjtj.pretty-match.com/upload/files/58774435161.pdfIn PDF document text
- http://dj-maily.com/uploads/pages/files/kejevugugop.pdfIn PDF document text
- http://embeddedhr.com/ckfinder/userfiles/files/74571348709.pdfIn PDF document text
- http://xn--80aab8aioy.xn--p1ai/userfiles/file/34541817827.pdfIn PDF document text
- http://packagingandfoodmachinary.com/userfiles/file/gemug.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_off0000f235.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF235	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010a4c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A4C	10328 bytes
SHA-256: `2824e63873b922116651de558319085023486259970a124ed1993a433fcc4e26`
`font_02_sfnt_off000121a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121A3	18004 bytes
SHA-256: `d0cc9ab60854d651a656430731f957d86d4a7a40da32572a657011e76d29635d`

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