PDF malware analysis — malicious · 00d5454a5ec24bc1

MALICIOUS

PDF

80.2 KB Created: 2021-09-15 22:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 98ba6e615afa5666b7359038f1b740eb SHA-1: f067bdfd0c2482dd47e72634ac63350002064b7b SHA-256: 00d5454a5ec24bc1fc0060e6640ce62f830a8036a48a42bf30c0a79743bbc236

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users. The presence of numerous external URIs, many pointing to disposable or suspicious domains, further indicates a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm strategy, likely to obscure the true malicious destination.

Machine Learning

Nyx PDF Classifier malicious score 0.9960

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=amiga+emulator+android PDF link annotation
- https://arkadas.yuzuktr.com/eskortarama.com/resimler/file/kezowujakuvuwikosudo.pdfIn PDF document text
- http://www.siphonicflowmandiri.com/upload/files/21320207460.pdfIn PDF document text
- http://vdadanang.vn/app/webroot/assets/files/76358530097.pdfIn PDF document text
- http://karat-dobremiasto.pl/userfiles/file/69441449990.pdfIn PDF document text
- http://abwnickersonplaza.com/uploads/files/95561866408.pdfIn PDF document text
- http://morethancars.nl/uploads/edytor/file/sufoxavoxibosit.pdfIn PDF document text
- https://nomaquito-travel.com/editor-images/tiwemevavatali.pdfIn PDF document text
- http://carrozzeriardue.it/userfiles/files/fodexolawiripa.pdfIn PDF document text
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d89f410b3b---zozegav.pdfIn PDF document text
- https://mb-classic-service.de/userfiles/file/27525842332.pdfIn PDF document text
- http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/zanarujib.pdfIn PDF document text
- http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/62765654359.pdfIn PDF document text
- https://lombardpruszkow.pl/local/userfiles/file/48951858817.pdfIn PDF document text
- http://driver-jazda.pl/upload/file/43406745587.pdfIn PDF document text
- http://regmac.net/userfiles/files/72238108136.pdfIn PDF document text
- https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c2993c578---tupesonefigobeguwulogad.pdfIn PDF document text
- https://posaonakosovu.com/ckfinder/userfiles/files/woxuzi.pdfIn PDF document text
- http://globalroomplus.com/bot/ckfinder/uf/files/vupebuxefikiriv.pdfIn PDF document text
- https://coaching-jk-academic.com/ckfinder/userfiles/files/15701966459.pdfIn PDF document text
- http://jandebruijn.com/uploadimages/files/diwokorowukudukil.pdfIn PDF document text
- http://hftyby.com/upload_fck/file/2021-9-7/20210907090612202608.pdfIn PDF document text
- https://businesslife.com/content/file/58886782380.pdfIn PDF document text
- http://acpiindia.com/userfiles/file/21217615006.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_off0000d56a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD56A	18040 bytes
SHA-256: `e6398676a69163fe7ddc998ab4244d4844e98689c49964f5a85b1303df7929b5`
`font_01_sfnt_off000103ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103AE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011bc5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BC5	10504 bytes
SHA-256: `94ff2eb26da587c7be1551f6b06daea663b9a0b150de7bb1f35515211d89d6b8`

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