PDF malware analysis — malicious · 9362fe5290d5e129

MALICIOUS

PDF

68.7 KB Created: 2021-09-26 17:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 78b1b7d062b6bf22ddaac5a31d0cd89f SHA-1: d4c097b2d80af9dbda4e943cc9e9219250b75b93 SHA-256: 9362fe5290d5e129875f6d6ac8829cf4ce6f26abe65208185ce8207015efef91

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable or compromised domains. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to redirect the user to further malicious sites or download additional payloads. The link farm structure indicates a deliberate effort to obscure the ultimate destination and potentially evade detection.

Machine Learning

Nyx PDF Classifier malicious score 0.9959

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 https://drafthe.ru/uplcv?utm_term=pok%C3%A9mon+offline+games PDF link annotation
- https://tidurmalam2.com/contents/files/6425699929.pdfIn PDF document text
- http://ajtoablakcentrum.com/_user/file/rupimubakef.pdfIn PDF document text
- https://paramourpourbebe.bettygagne.ca/userfiles/file/25928205967.pdfIn PDF document text
- http://exms.fr/sites/default/files/file/68445375427.pdfIn PDF document text
- http://rujiahk.com/uploadfiles/file/17934649760.pdfIn PDF document text
- https://emotionalgift.com/ckfinder/userfiles/files/62647821280.pdfIn PDF document text
- https://thefertilizergranulators.com/d/files/godorefavejaminonabawutaz.pdfIn PDF document text
- http://grandinhr.eu/images/user/file/94092845110.pdfIn PDF document text
- https://bakotech.at/uploads/ckeditor/files/fuxebuxinujimi.pdfIn PDF document text
- http://ecofincas.net/ckfinder/userfiles/files/31935409708.pdfIn PDF document text
- http://modra-skola.cz/userfiles/file/popifevigagerizomowoxiso.pdfIn PDF document text
- http://cdkuys.handysociality.com/upload/files/zoxopapisaxozuxivojo.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614425d99a959---jebodopiwunobewu.pdfIn PDF document text
- http://oreoltour.ru/sites/default/files/file/zulajizikisevu.pdfIn PDF document text
- https://adikketiga.com/contents/files/7246192587.pdfIn PDF document text
- https://thietbivesinhsonhoa.com/webroot/img/files/80342985468.pdfIn PDF document text
- https://whiteplacard.com/UserFiles/file/45827738771.pdfIn PDF document text
- http://agro-partner.com/Image/files/sajidagovebiberijadi.pdfIn PDF document text
- https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/161506b729a5de---7272731430.pdfIn PDF document text
- https://tainandentist.com/uploads/files/202109240046447519.pdfIn PDF document text
- https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/i5d5mmuff4qo248hu89iabuk3p/muvisidako.pdfIn PDF document text
- https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/84468aeaab04b40199f352cd31bfb258/xajebuziwonojosotibasapa.pdfIn PDF document text
- https://chachachat.info/js/ckfinder/userfiles/files/60376105302.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_off0000aec9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAEC9	10604 bytes
SHA-256: `b2a0a485a6d1d6bfe001e0425363bb92b3fdc54aa2b25243f261c4809f22d3a5`
`font_01_sfnt_off0000c6b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6B0	14860 bytes
SHA-256: `e17d646b89cb032d3043bf0bed6c7244dbc0196e1673c9e65bc564202e60bdee`
`font_02_sfnt_off0000ebf4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBF4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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