PDF malware analysis — malicious · e45561178b97f563

MALICIOUS

PDF

83.4 KB Created: 2021-09-06 14:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: c805341ada29df2978b4c88e92d0c38e SHA-1: 484cc4f24751a273906b6f16fa43a4f84f6f2ce8 SHA-256: e45561178b97f56315aaed0c8917cf39ffea2823a1ebf07c1f587b0ccaad789a

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of a link farm pointing to compromised CMS uploads and disposable hosting suggests an attempt to obscure the final malicious destination. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification, likely involving phishing or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826b0fa1a09---51900627918.pdf In PDF document text
- https://honghow.com/ckfinder/userfiles/files/lezetiden.pdfIn PDF document text
- https://leuphuotcamap.com/uploads/image/files/sixemibogepefopus.pdfIn PDF document text
- http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66934467857.pdfIn PDF document text
- http://a1-automotivegroup.com/upload/files/26336853250.pdfIn PDF document text
- http://webursitet.org/Files/file/rupidagetotogusujorojuju.pdfIn PDF document text
- https://bestofbucerias.com/upload/file/ximolokoxesekotema.pdfIn PDF document text
- https://balajitutorial.com/admin/userfiles/file/merev.pdfIn PDF document text
- http://cga82.com/admin/File/81783700037.pdfIn PDF document text
- http://lamorenj.com/userfiles/file/xegifidomorojubufajefab.pdfIn PDF document text
- http://etcad.net/np/upfile/file/60819699725.pdfIn PDF document text
- http://agriturismolataggiasca.eu/userfiles/files/gatisewarevavatogarefoje.pdfIn PDF document text
- http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16205848723393.pdfIn PDF document text
- https://liantoong.com/archive/upload/files/penamuxutolizeviwakula.pdfIn PDF document text
- https://srmhomes.com/images/bulk_images/files/76783090552.pdfIn PDF document text
- http://xn--989ap7r0xbd5x.com/upload/fckeditor/file/mofijifub.pdfIn PDF document text
- http://dlshixiang.com.cn/ckfinder/userfiles/files/37393782230.pdfIn PDF document text
- http://originalcheck.it/public/img_admin/file///dogezotiva.pdfIn PDF document text
- http://transinfosoft.com/userfiles/file/jiniguwedipotefun.pdfIn PDF document text
- http://daisin1977.com/js/upload/files/86070027425.pdfIn PDF document text
- https://bushregenerators.net/userfiles/files/bumosorerefuwevod.pdfIn PDF document text
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16078ffdc86941---vipirejenoduwu.pdfIn PDF document text
- http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611915dd3674b---6484306369.pdfIn PDF document text
- https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b372fed7814---norix.pdfIn PDF document text
- https://ooobelkom.ru/ckfinder/userfiles/files/41283894226.pdfIn PDF document text
- http://dragoniresorts.com/userfiles/nosubibefojuxeguzalar.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=chrysler+town+and+country+2006+repair+manualPDF 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_off0000dece.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDECE	17356 bytes
SHA-256: `0434dbd02e8505fcd008a6307ea139c8fcb353713341d6cdcce5c1067b8e8ad3`
`font_01_sfnt_off00010c07.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C07	11520 bytes
SHA-256: `40981a3fc9aaeb79c95bb4f6538b61a03eaa209627898b6bde5cd5bb27cab456`
`font_02_sfnt_off0001274a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1274A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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