PDF malware analysis — malicious · 190ea4ee9bbca392

MALICIOUS

PDF

82.4 KB Created: 2021-09-19 06:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 8c2cfe9a3f3fbb62bec0313f5dbcffac SHA-1: 1daab44a5581de16e758acec8eb11121eadac2b2 SHA-256: 190ea4ee9bbca392aab4166f14e9ba2e479967f9de39d42950953585c2ae4a9f

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF also contains numerous external URIs, many of which point to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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 http://renovfab-menuiserie.com/userfiles/file/zuturerusigakamo.pdf In PDF document text
- https://www.nbc.com.vn/ckfinder/userfiles/files/66895365029.pdfIn PDF document text
- http://busankid.com/webfiles/board/file///88696477239.pdfIn PDF document text
- http://educasters.co/ckfinder/userfiles/files/39385135661.pdfIn PDF document text
- https://proektasis.gr/admin/spaw2/uploads/files/18789231318.pdfIn PDF document text
- https://mimpishio2.com/contents/files/pinatufebub.pdfIn PDF document text
- http://hyunsin.net/userfiles/file/31568167817.pdfIn PDF document text
- http://www.ciesol.com/ckfinder/userfiles/files/gepusexese.pdfIn PDF document text
- http://farashimirooz.com/files/kuvaruf.pdfIn PDF document text
- https://canoe.ro/Extras/ckfinder/userfiles/files/tiwivuku.pdfIn PDF document text
- https://aptitudeclass.com/ckfinder/userfiles/files/fadunesokelekitukonot.pdfIn PDF document text
- http://gutachterbewertung.de/userfiles/file/xebodetefujujukopodananu.pdfIn PDF document text
- http://allier-genealogie.org/File:/64319340940.pdfIn PDF document text
- http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145298b5bfc1---bekizuxunipawip.pdfIn PDF document text
- http://tantos.jp/js/upload/files/7566994067.pdfIn PDF document text
- http://maybomnuocdanang.com/uploads/image/files/zedaketumi.pdfIn PDF document text
- http://peaceinsrilanka.lk/userfiles/file/kasexaridawudujudikudivew.pdfIn PDF document text
- https://mimpiindah88.com/contents/files/fujaxagonetegufekugezugev.pdfIn PDF document text
- http://eros-arena-reutlingen.de/eros/userfiles/file/momosekit.pdfIn PDF document text
- https://uleshuzataruhaz.hu/files/file/fujemobisa.pdfIn PDF document text
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec04fcb049---64709402208.pdfIn PDF document text
- http://shbaicun.com/userfiles/file/2021091305053673499.pdfIn PDF document text
- http://adamlegal.com/userfiles/file/nifopuxanuxamusozutogo.pdfIn PDF document text
- http://satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/37705877740.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=binary+to+hex+calcPDF 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_off0000deb3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEB3	10428 bytes
SHA-256: `4432d39e62a20ca6430672861321986f793443d2951fb9ec2069713ad8fdf48d`
`font_01_sfnt_off0000f64b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF64B	17616 bytes
SHA-256: `e9021c0625b8ef96c59d586c7e81bc8bd3e5b6778868acdbd258fa0bc03ee3e7`
`font_02_sfnt_off00012426.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12426	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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