PDF malware analysis — malicious · 64feda0ee9b2d09c

MALICIOUS

PDF

75.7 KB Created: 2021-09-17 04:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: a7d1081e6945b7b29e1e58e0acb79ad2 SHA-1: 74442e67a88c9641b25f4aa88e71caf5e1b029fb SHA-256: 64feda0ee9b2d09c98f5d0accae3651b845d753ef6f1a81c5de88d0d69b4ff05

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 point to disposable or low-reputation domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by redirecting users to compromised or malicious websites. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://queure.ru/uplcv?utm_term=how+to+use+your+phone+as+gamepad+for+android+tv PDF link annotation
- https://tezerwatch.com/file/upload/files/09-04-13-07-42-50.pdfIn PDF document text
- https://luxm.pl/userfiles/file/77665388604.pdfIn PDF document text
- http://mxm-hosting.nl/img/editor/file/nasufijiwebawu.pdfIn PDF document text
- https://ebus.myskoolapp.com/FCKeditor/FCKimgUpload/file/32029775247.pdfIn PDF document text
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/161405f13346b6---suledufawujovul.pdfIn PDF document text
- https://ildiko-szepsegszalon.hu/userfiles/file/mudalutupawa.pdfIn PDF document text
- https://nyirfa.hu/uploads/files/28442348465.pdfIn PDF document text
- http://www.mmalappeenranta.com/tiedostot/files/80444474650.pdfIn PDF document text
- http://zjhywt.com/images/upload/File/65304801026.pdfIn PDF document text
- https://namhunglogistic.vn/site/files/84441668877.pdfIn PDF document text
- http://matsonconstruction.net/userfiles/file/janepipojujagomilibe.pdfIn PDF document text
- http://ajitcoatings.com/uploads/82714528720.pdfIn PDF document text
- https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/57679857742.pdfIn PDF document text
- https://anakaygame.net/calisma2/files/uploads/nuxasumekazofujigonedores.pdfIn PDF document text
- http://iseveranscopy.com/upload/editor/file/59457609866.pdfIn PDF document text
- http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16143e7d2cec7e---zalibedusalubi.pdfIn PDF document text
- https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/tibedofaxov.pdfIn PDF document text
- http://raegcafe.com/uploads/files/67185418561.pdfIn PDF document text
- http://5percent-design-action.com/upload/users/files/63497306008.pdfIn PDF document text
- https://lockerova.eu/admin/upload/documents/zosedapimixarilili.pdfIn PDF document text
- http://gr-chem.com/upload/files/wuwadaxovab.pdfIn PDF document text
- http://pamatudarbai.lt/ckfinder/userfiles/files/wadawunapi.pdfIn PDF document text
- https://luathoanghuy.com/uploads/files/widoxowisaxe.pdfIn PDF document text
- http://wellnesszeewolde.nl/site/data/ws/files/95298011894.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_off0000c3b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC3B3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000dbca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBCA	11256 bytes
SHA-256: `f1b4494039051eb3d718b257a18373745dc4bf23ce36a9da2b7408b2caecf9d2`
`font_02_sfnt_off0000f5e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5E0	16768 bytes
SHA-256: `b701a734d9f72d083ef17ca481d30d55855caa6f8fcb132b4f27ecbd5e44b8f8`

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