PDF malware analysis — malicious · 7a119bee4a81eb70

MALICIOUS

PDF

70.4 KB Created: 2021-09-09 01:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: fe4c422aafca5f6d7c2eb3d173315f69 SHA-1: 4092c9cbf42fa741e7f8d38b1bbaac137a209fa5 SHA-256: 7a119bee4a81eb70ddf08d619e3e88465fcdacfaa21dd2b7655cca4b42dd7d37

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://aylabawadi.ae/userfiles/file/2825239032.pdf In PDF document text
- http://phayaotechno.com/UserFiles/File/tubuvoxubenobufun.pdfIn PDF document text
- http://fatamorgana.fr/uploads/assets/file/xidurasetanu.pdfIn PDF document text
- https://jakspravnenapsa.cz/userfiles/file/pekuzo.pdfIn PDF document text
- http://apothepharma.com/upload/files/tilisizelivunutusakop.pdfIn PDF document text
- http://ourconn.com/userfiles/file/202109021014477623.pdfIn PDF document text
- http://www.stadion-zarya.ru/ckfinder/userfiles/files/vobazin.pdfIn PDF document text
- http://maxidmum.com/images/upload/fck/file/45266517331.pdfIn PDF document text
- https://polaria.cz/images/file/xumixef.pdfIn PDF document text
- http://giteduguedesboires.com/userfiles/file/35459732082.pdfIn PDF document text
- https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/mejexix.pdfIn PDF document text
- http://npi-management.com/ressource/site-image/files/gilotigavo.pdfIn PDF document text
- https://aymsoft.us/aym_image/files/53500151049.pdfIn PDF document text
- https://safecampus.in/cmsCart/upload/file/zurijositof.pdfIn PDF document text
- http://perevodvnegiloifond.ru/pict/file/ruzobuwab.pdfIn PDF document text
- http://gourmethousemacau.com/UploadFilesfile///vilomazibadutujazepajumif.pdfIn PDF document text
- http://vikingpaint.com/user_file/file/sufemaxajafubiliwe.pdfIn PDF document text
- http://marinapogon.pl/upload/file/fobapezopodirepanomijusam.pdfIn PDF document text
- https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/5849fea07d8bcd72194220828b8bf421/34824480579.pdfIn PDF document text
- http://jgweld18.com/UploadFile/file/20210907090246014.pdfIn PDF document text
- https://vico-real-estate.com/ckfinder/userfiles/files/xoxep.pdfIn PDF document text
- http://www.msjcongregation.org/www/js/ckfinder/userfiles/files/90302766330.pdfIn PDF document text
- http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133a8846b849---notolawunosexezafugoz.pdfIn PDF document text
- http://nasledie-sluck.by/var/upload/file/99627281171.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+update+my+apps+on+play+storePDF 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_off0000b57b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB57B	10752 bytes
SHA-256: `200968dc79d0d0817a486e2054a8a2d3961bd6a4bd595239eb3e2476d1741065`
`font_01_sfnt_off0000ce42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE42	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e654.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE654	14724 bytes
SHA-256: `d7329d46fdd06c8e8e1376b6652c1e0c401b7bd622fdab325ba7c9bf5daf095d`

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