PDF malware analysis — malicious · a4c7b857a7712778

MALICIOUS

PDF

82.5 KB Created: 2021-09-16 03:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 5a1f79e39a5b896cac1552f357ba8a30 SHA-1: 73270e944c154a120af51c9ebbd48e45edd219df SHA-256: a4c7b857a7712778a166ee249a3a90ccc74e179dc4f9a8818a5f770bc685b70a

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 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 exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://wastran.ru/uplcv?utm_term=suicide+squad+extended+cut+streaming PDF link annotation
- http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16141bda529cbd---riduzaxobabanimuxibigi.pdfIn PDF document text
- http://pescepiana.eu/userfiles/files/dugobogum.pdfIn PDF document text
- https://www.profiemg.cz/upload/ck/files/tinezuxagemolelabediw.pdfIn PDF document text
- https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddfa5587d0---mexukudo.pdfIn PDF document text
- http://telegid.tv/userfiles/file/76400345685.pdfIn PDF document text
- https://www.fibertech1.com/my_content/js/ckfinder/userfiles/files/jotajikudifelizotufili.pdfIn PDF document text
- http://wangguanhardware.com/userfiles/file/91787486049.pdfIn PDF document text
- https://paysecure.ro/ckfinder/userfiles/files/26184970513.pdfIn PDF document text
- http://dui-antidote.com/images/userfiles/file/67843041658.pdfIn PDF document text
- https://vinaarc.com/app/webroot/files/ckfinder/userfiles/files/gezupobumedufunofove.pdfIn PDF document text
- https://huanghecables.com/d/files/nemuvopoto.pdfIn PDF document text
- http://kientrucsangtrong.com/plus/files/dofidasixasameful.pdfIn PDF document text
- http://didopack.com/files/51781356021.pdfIn PDF document text
- https://dienmayminhchau.vn/uploads/news_file/98324335629.pdfIn PDF document text
- https://shreenathtechnologies.com/userfiles/file/88193173558.pdfIn PDF document text
- http://xn--80aer5aza.xn--c1acndkmcarx.xn--p1ai/ckfinder/userfiles/files/15427956133.pdfIn PDF document text
- http://laconchigliacasevacanze.it/userfiles/files/dukupawumikoxetal.pdfIn PDF document text
- https://bozoklar.org/ckfinder/userfiles/files/tavegazerug.pdfIn PDF document text
- http://lex.tj/img/file/4646838785.pdfIn PDF document text
- http://lemma-studio.pl/userfiles/file/92893220927.pdfIn PDF document text
- http://ueros.fr/admin/ckfinder/userfiles/files/28009172111.pdfIn PDF document text
- http://smepil.com/ckeditor/userfiles/files/nexoj.pdfIn PDF document text
- http://monteconsultants.com/image/upload/File/xuwami.pdfIn PDF document text
- http://metamorfozyayincilik.com/userfiles/file/polufupakoja.pdfIn PDF document text
- http://www.cst.rnu.tn/js/ckfinder/userfiles/files/zezupizalamijagax.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_off0000dc76.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC76	17776 bytes
SHA-256: `fbc8d1d7f17356ab6d6c35622fd4fdace24f7ca052245f567e65f90825944d95`
`font_01_sfnt_off00010b03.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B03	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001231a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1231A	10968 bytes
SHA-256: `2087d310704be0fdfebab833004dd37bd42f4f5ce7ccc24417a9e6548d9be7ea`

Open this report in the interactive analyzer, or submit your own file for analysis.