PDF malware analysis — malicious · e8e7de568c4ef596

MALICIOUS

PDF

76.0 KB Created: 2021-09-23 20:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 3b4c6575dca3d84742ff9149183f100a SHA-1: 2d2edf5b63d040d2db495338c63e8eadcb120c20 SHA-256: e8e7de568c4ef596ad0f805395b53b19f97a1c3f5fd072908651b7d50427d165

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF containing embedded JavaScript, flagged by ML classifiers and ClamAV as malicious. It includes numerous external URIs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection to these malicious URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9948

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://coretry.ru/uplcv?utm_term=how+to+transfer+files+from+a+dead+phone PDF link annotation
- https://sanagustin.cl/files/mujopevofi.pdfIn PDF document text
- https://alsultantrading.ae/userfiles/files/gifatip.pdfIn PDF document text
- http://gfb.it/upload/fck/file/gevarurofanakojunidusuk.pdfIn PDF document text
- http://kehlux.lu/userfiles/files/fomowowuzulozesinexox.pdfIn PDF document text
- http://fbrasil.com/userfiles/file///finobitakoxoregud.pdfIn PDF document text
- https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/bopukojuneremomad.pdfIn PDF document text
- https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/98005255017.pdfIn PDF document text
- http://mq-water.net/upload/vofelefabagu.pdfIn PDF document text
- http://backupcenters.com/userfiles/file/zomaxefi.pdfIn PDF document text
- http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1632246489.pdfIn PDF document text
- https://oasis-travel.ro/files/banapupuzeletozozisiwuto.pdfIn PDF document text
- http://maskaevlawyer.ru/userfiles/file/nokiserikigebilamiguxa.pdfIn PDF document text
- http://canshu.dlzj.net/upload/files/20210903233146636512.pdfIn PDF document text
- http://hondatayho.vn/images/ckeditor/files/fafuxewopavunojomuwaruno.pdfIn PDF document text
- https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/pegotivujibakap.pdfIn PDF document text
- http://ip-golubev.ru/ckfinder/userfiles/files/wulusepetemiro.pdfIn PDF document text
- http://fotografiafrancescosomma.com/userfiles/files/jarisidaronimazugoxizo.pdfIn PDF document text
- https://susta.vn/userfiles/file/56926292648.pdfIn PDF document text
- http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16141c114b327d---82127236941.pdfIn PDF document text
- http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/keporokumipadozixava.pdfIn PDF document text
- http://areawifi.com/DESARROLLO/userfiles/files/35912484526.pdfIn PDF document text
- http://xn--k1akb4c.xn--p1ai/userfiles/file/45847250904.pdfIn PDF document text
- https://prokoncept.hu/admin/blogfck/image/file/rukapubiposawuzurenurum.pdfIn PDF document text
- http://abogadosaguilar.com/ckfinder/userfiles/files/63971297741.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_off0000c578.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC578	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000dd8a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD8A	16936 bytes
SHA-256: `c52308f00c722089e7d24931c63717324b565da18181d0c03f84bd42cc866015`
`font_02_sfnt_off00010974.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10974	10840 bytes
SHA-256: `4c33f73d881b92cf29bfb554de49583ba97745ac70cc2f68b2e2140a5cf26ce3`

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