PDF malware analysis — malicious · fb9cfa07c043a31c

MALICIOUS

PDF

104.2 KB Created: 2021-09-09 02:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 4ebe758b3722d416a4ac1e636775df0d SHA-1: fb35b387017d1a041b940439686e1b3988769e22 SHA-256: fb9cfa07c043a31c68413475255215d1b16cfb23a89cd54e215a96348c42d2e1

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains, indicating a link farm for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 0.9970

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://yujinpharma.com/upload/files/kosalelosinuzuxajegegefi.pdf In PDF document text
- https://ever-progress.dacola.com/upload/files/47323902459.pdfIn PDF document text
- https://phuquiland.com/upload/files/posade.pdfIn PDF document text
- http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/1669384452.pdfIn PDF document text
- http://kamakuralosgatos.com/uploads/files/56753074993.pdfIn PDF document text
- http://ventiliatoriai.lt/js/ckfinder/userfiles/files/dalofijasopurogonijenisa.pdfIn PDF document text
- http://poslovniimenik.net/firme_data/files/dixilaronegoxotova.pdfIn PDF document text
- http://littlepearlspublishing.in/data/eimages/file/metofafumu.pdfIn PDF document text
- https://isleo.com/i_photos/file/17566763984.pdfIn PDF document text
- http://shtaket46.ru/page_edit/_samples/userfiles/files/lavigabalaviforotu.pdfIn PDF document text
- https://tonere.shop/app/webroot/files/userfiles/files/ronubikufowelojodomiz.pdfIn PDF document text
- https://novinfasteners.com/userfiles/file/92753695779.pdfIn PDF document text
- http://cyuanmei.com/userfiles/file/32563731712.pdfIn PDF document text
- https://ibexquimica.com.br/ckfinder/userfiles/files/67042064757.pdfIn PDF document text
- https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/r0l6o43pbih1n6n0se8c28871b/90330660469.pdfIn PDF document text
- http://ammk.sk/userfiles/file/badupobaxabarusofim.pdfIn PDF document text
- https://chokysitohang.com/Uploads/userfiles/files/pururafozudubenizi.pdfIn PDF document text
- https://ventadeterrenosurbanos.com/userfiles/file/66595064020.pdfIn PDF document text
- http://chrisdepanneservices.com/Sites/cds/files/tufura.pdfIn PDF document text
- http://minhphucvietnam.com/uploads/userfiles/file/surijap.pdfIn PDF document text
- http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/d425de1167d7ee5e6a0002896fd6b141/30163368780.pdfIn PDF document text
- https://snqrsl.quebec/upload/editor/file/sukasupeligorabazitode.pdfIn PDF document text
- http://dreesmann-foto.de/userfiles/file/92935635587.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=god+of+war+iii+for+androidPDF 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_off00013545.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13545	18148 bytes
SHA-256: `7e77f17268d73ecf3239a978a3a8840c58320a58279251a24df7abff746815d5`
`font_01_sfnt_off0001648d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1648D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00017ca4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17CA4	10028 bytes
SHA-256: `f5dfa85c4281f87952317b4f3f5eb7bf805e4a565ad95898ec9d37553a7fe76d`

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