PDF malware analysis — malicious · 8ccd3e62a752147a

MALICIOUS

PDF

73.4 KB Created: 2021-09-22 09:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 77d66b7d6a82822db13a4b54ac30e43c SHA-1: f68ecc989cb3d73e39ae35e6ce432bd77adcd92b SHA-256: 8ccd3e62a752147a8451aa3b2c1522f9a97489dc7a9d9834fa75526879efefdd

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded JavaScript and numerous external URIs, many of which point to a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the redirection to these malicious sites.

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 http://eurolocal.info/sites/default/files/images/file/26271157841.pdf In PDF document text
- http://caogenzhiben.com/filespath/files/20210917011021.pdfIn PDF document text
- http://sushiyaslo.com/uploads/files/6768258268.pdfIn PDF document text
- http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161496422b8f5f---29558975269.pdfIn PDF document text
- https://lanjutpt1.com/contents/files/31335152527.pdfIn PDF document text
- https://ismet.com.br/ckfinder/userfiles/files/kedonewavebeligujinesem.pdfIn PDF document text
- http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143e3534af17---58109117210.pdfIn PDF document text
- https://fonixkoncert.hu/upload/file/67744310335.pdfIn PDF document text
- http://0-50.ru/userfiles/file/tabenoni.pdfIn PDF document text
- https://www.pharmawell.eu/ckfinder/userfiles/files/tekopupodazixasofil.pdfIn PDF document text
- https://kujainspectors.com/candyticket/uploads/page_images/files/10556329254.pdfIn PDF document text
- http://mdknoodles.co/uploads/files/rovojizizifesibajuroger.pdfIn PDF document text
- https://bisleriuber.genefied.co/ckfinder/userfiles/files/mokojamafilikotakej.pdfIn PDF document text
- http://demenagements-remond.fr/userfiles/file/20210913205821.pdfIn PDF document text
- http://gruppocinofilomarsalese.com/userfiles/files/keresunigebuzoraravizanu.pdfIn PDF document text
- http://caycanhtuyhien.com/uploads/image/files/57016945958.pdfIn PDF document text
- http://defhjdr.friend-match.com/upload/files/42592447421.pdfIn PDF document text
- https://fgcrubochi.com.ng/ckfinder/userfiles/files/1102634211.pdfIn PDF document text
- http://plechotice.sk/tmp/file/24126403361.pdfIn PDF document text
- https://ceral.pl/ceral/pliki/file/91367163399.pdfIn PDF document text
- http://hoangnamjsc.com/upload/files/63870563487.pdfIn PDF document text
- http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/zaxipasopipim.pdfIn PDF document text
- http://nanouklid.cz/upload/file/16197292053.pdfIn PDF document text
- https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/wuwexes.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=what+is+trusted+face+appPDF 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_off0000bd03.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBD03	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d51a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD51A	10540 bytes
SHA-256: `76caf26e2ec5fee0206a5bb3460523988738eb2c1f646edf518a0864c628f9fc`
`font_02_sfnt_off0000ed45.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED45	16640 bytes
SHA-256: `e11820e8a36cb4f1f2c9527a8b8a987cc316d5483a800cf1156c89d69b037398`

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