PDF malware analysis — malicious · 25d62f61a484bfa8

MALICIOUS

PDF

77.2 KB Created: 2021-09-19 03:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 5695aad393e30a601948f038cdb46e9d SHA-1: a83231770d5b2aca256c0c162dd66c7e1d14dcda SHA-256: 25d62f61a484bfa88ba9fed6d55a473b6231e2e9726b42abe8c8c5077ae47d14

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and external URIs pointing to suspicious domains, suggesting it's designed to redirect users to potentially harmful content or download further payloads. The PDF structure and numerous external links indicate a phishing or link-farming attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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 https://pixomot.ru/uplcv?utm_term=bus+simulator+indonesia+hack+apk+download PDF link annotation
- http://imosa.asia/uploads/files/202109081501581449.pdfIn PDF document text
- https://mlspoland.co/files/file/sikoparisujerokezevel.pdfIn PDF document text
- https://maviet.vn/upload/files/parosavedupevoke.pdfIn PDF document text
- https://bunianco.com/other_files/File/segowepuxof.pdfIn PDF document text
- http://stsmcc.org/www/js/ckfinder/userfiles/files/70501719682.pdfIn PDF document text
- http://www.sname.org.tw/sname/ckfinder/userfiles/files/63675779082.pdfIn PDF document text
- http://learnersdigest.org/userfiles/file/15945903794.pdfIn PDF document text
- http://charolais-hessen.de/write/userfiles/file/setavade.pdfIn PDF document text
- https://matteagianotti.ch/userfiles/files/kejumisofo.pdfIn PDF document text
- https://akemi.ro/hirek/file/dazepifoxevepapebufu.pdfIn PDF document text
- http://cokhitienvuong.com/uploads/files/tivebewa.pdfIn PDF document text
- https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/abf25b5320bb17fbb435dd9498267489/54083355540.pdfIn PDF document text
- https://caraudioshop.ro/mm/file/12052812882.pdfIn PDF document text
- http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a21bb4b115---40072219977.pdfIn PDF document text
- http://tienphat.vn/imagesflashupload/file/gatazikumagunezo.pdfIn PDF document text
- http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/zewoxetigewotekiwamalolon.pdfIn PDF document text
- http://brlairport.com/images/file/laborujudebibeporidasuko.pdfIn PDF document text
- http://altelaw.com/uploads/image/file/luzufekevuz.pdfIn PDF document text
- http://demo755.webbazaar.com/uploads/7914201674.pdfIn PDF document text
- http://szhlfz.net/upload/romexugo.pdfIn PDF document text
- https://ises.ca/phpsites/vertical_living/uploads/file/51082682335.pdfIn PDF document text
- http://liavanhaeringen.nl/userfiles/files/84615517683.pdfIn PDF document text
- https://www.sterlingsez.com/ckfinder/userfiles/files/72410481555.pdfIn PDF document text
- http://hebammenglueck.de/ckfinder/userfiles/files/sebifozi.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_off0000c540.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC540	11112 bytes
SHA-256: `794468e086e18c6d9cc9b3cc51118cb2340a04afa211f9d96e8286c448894318`
`font_01_sfnt_off0000df13.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF13	18628 bytes
SHA-256: `4078129111d516c4acb8cd034271b9a6524fd7fd071c4edd08db861d39841752`
`font_02_sfnt_off00010ed6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10ED6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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