PDF malware analysis — malicious · daa1fd2b7ec3a93a

MALICIOUS

PDF

78.1 KB Created: 2021-09-10 11:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01

MD5: e54bed7aad66c304965d7c0cee718184 SHA-1: c85d6ce3e2debdb0813ea8218d4ee253c5436c66 SHA-256: daa1fd2b7ec3a93a2d2555cb7709c909726fb3db9345d1203f79b198885cbd41

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://coretry.ru/uplcv?utm_term=fun+phone+call+hack+apk+download PDF link annotation
- http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/22634373246.pdfIn PDF document text
- http://biznesfishki.ru/files/userfiles/files/sados.pdfIn PDF document text
- http://szkolka-wiercioch.pl/files/file/69892999918.pdfIn PDF document text
- http://mentor-tutor.com/newGroserLikeProject/uploads/files/24788150208.pdfIn PDF document text
- https://eetravel.net/file/wogere.pdfIn PDF document text
- http://asclyziarskyklub.sk/userfiles/file/pifufalixanemij.pdfIn PDF document text
- https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/leterowenolufesulibovaxu.pdfIn PDF document text
- http://fra2ange.it/userfiles/files/30137601277.pdfIn PDF document text
- https://penmypoem.com/new/admin/uploadfiles/file/titevixojuxiwevokuw.pdfIn PDF document text
- https://er-cardiff.com/eurostyl/photos/file/tuwujebu.pdfIn PDF document text
- https://cuatudongsaigon.net/uploads/files/gimuwefitedegelufubuv.pdfIn PDF document text
- http://teplo76.ru/uploads/file/94259552992.pdfIn PDF document text
- http://pomelieagency.com/userfiles/files/13627945212.pdfIn PDF document text
- http://abnigakgdsg.friendship-match.com/upload/files/taxedowutadixowupirozanop.pdfIn PDF document text
- http://shopsuathientu.com/uploads/userfiles/file/bosudeseradebumexonek.pdfIn PDF document text
- http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613715d136ba6---90103761000.pdfIn PDF document text
- http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/gowenapixin.pdfIn PDF document text
- https://indicaperu.com/userfiles/file/vitagolupaxufugemuperis.pdfIn PDF document text
- http://another-partner.morefriendship.com/upload/files/24368630719.pdfIn PDF document text
- https://tybistanbul.org/resimler/files/5718923696.pdfIn PDF document text
- http://www.cbs-emballages.com/upload/file/31032640180.pdfIn PDF document text
- https://epgeptech.hu/ckfinder/userfiles/files/43609579381.pdfIn PDF document text
- https://drisraadentalcenter.com/userfiles/file/58636993837.pdfIn PDF document text
- https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613176f4ecac6---gusifurofixukosaluxije.pdfIn PDF document text
- http://antonioruizabogados.es/userfiles/file/lutaxi.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_off0000cc29.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC29	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e440.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE440	10408 bytes
SHA-256: `434794b62c25e7f221ccd46a6bd2fa984fa84047ba40e8a0fe0fcebfc0e91de1`
`font_02_sfnt_off0000fbbd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBBD	18280 bytes
SHA-256: `9d38e3be79aaa31cfdf59d80641c73141a0b2400bafc337ccd8e43dda8693a61`

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