PDF malware analysis — malicious · 9d95e690183a91cd

MALICIOUS

PDF

70.3 KB Created: 2021-09-24 19:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 79f82d305cda9d56eb8257f5bbc0e353 SHA-1: a4aeed05246b048a6cf0bfea3bbcc678b4f1f3d9 SHA-256: 9d95e690183a91cdd095f8c31542aef951e12f808207e41e92a5d4f4a23eaa2f

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF containing an embedded JavaScript stream, which is a common technique for executing malicious code. The numerous URLs, many hosted on compromised CMS upload directories or disposable domains, indicate a likely phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9916

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://www.moyekolodin.com/files/9370592577.pdf In PDF document text
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300935032c4---gepidipesenuwukunuteseja.pdfIn PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d420ddd3fe---tigis.pdfIn PDF document text
- http://livelyway.com/ckfinder/userfiles/files/vuzavo.pdfIn PDF document text
- http://residencecarlofelice.com/userfiles/files/lofibobigaxarujilexiwubu.pdfIn PDF document text
- http://888spirits.com/userfiles/file/togaxezafavidet.pdfIn PDF document text
- http://heryeryesil.com/resimlerfiles/varuwukugal.pdfIn PDF document text
- https://jf-orvalho.pt/userfiles/file/saxajasu.pdfIn PDF document text
- http://erbamedica.org/userfiles/files/620246870.pdfIn PDF document text
- https://tinhhoaxanh.vn/userfiles/file/xanoluliwutabasunasitebo.pdfIn PDF document text
- http://njbeihang.com/uploadfile/file///2021090300052797.pdfIn PDF document text
- https://heatingboiler.ca/fck_upload/file/tagozizadajetejigovuzuva.pdfIn PDF document text
- http://pibar.tw/uploads/files/202109031010103651.pdfIn PDF document text
- http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9766757ba---43980295232.pdfIn PDF document text
- http://dianacb.cz/userfiles/file/namovametosomowunirumo.pdfIn PDF document text
- http://ncfc.com.tr/ckfinder/userfiles/files/68571303953.pdfIn PDF document text
- https://oreopay58.com/ckfinder/userfiles/files/belefolubonajuf.pdfIn PDF document text
- http://rovitek.com/userfiles/file/dowegugi.pdfIn PDF document text
- http://garagehayashi.com/js/upload/files/pokerozebomakefaguginifun.pdfIn PDF document text
- https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd5c77fd8b---85872152954.pdfIn PDF document text
- https://batikatravels.com/userfiles/file/kezobefox.pdfIn PDF document text
- http://dreamwith.gni.kr/ckupload/files/lawixu.pdfIn PDF document text
- http://bjerkelunden.org/content/files/userfiles/file///fexozinobagix.pdfIn PDF document text
- http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/92394468184.pdfIn PDF document text
- https://zlato-stribro-investice.com/upload/files/zimopoxifa.pdfIn PDF document text
- https://psihodesk.ro/ckfinder/userfiles/files/jujetimuxogivegojezivol.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=apps+to+share+files+between+pc+and+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_off0000b328.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB328	10924 bytes
SHA-256: `7745e934b150c1e3af66c0fac476b489cc0dfb0d322ead000c05f320994b5ce4`
`font_01_sfnt_off0000cc4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC4E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e460.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE460	15448 bytes
SHA-256: `289d994d33af83ed9c3bf9b504d202b96f669a642dc435cabd7d1b3729eccb46`

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