PDF malware analysis — malicious · 05d9ea291b1ecc55

MALICIOUS

PDF

89.7 KB Created: 2021-06-30 05:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 90ef8e8e68b54e29aeb767b3f2e58dce SHA-1: 1d1229d5b8106c2e1a0d5833eba82923531fd7c0 SHA-256: 05d9ea291b1ecc557c412e47ca30987f1dee91121e7c0387c2f06f6bacc465af

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on compromised CMS uploads and disposable domains. The presence of embedded URLs and the nature of the heuristics suggest the PDF is intended to redirect users to phishing sites or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://garglob.ru/uplcv?utm_term=charpy+impact+notched PDF link annotation
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/cbf604004504cc96c7039fac021141ff/roxudigisiwapero.pdfIn PDF document text
- http://jyjwqj.com/uploadfile/file///2021062906171135.pdfIn PDF document text
- https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/e1ac7924ea29c4a4a5070b57755c70c7/zuserunodosapiruwo.pdfIn PDF document text
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/cf9b84b509820cfeaecd84d2921ff24f/gojikidivuxaxoneguxo.pdfIn PDF document text
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16081147a371fe---50763257247.pdfIn PDF document text
- https://deniz-sogutma.org/img/userfiles/file/62611007235.pdfIn PDF document text
- https://dolmalatrek.com/userfiles/file/80379808823.pdfIn PDF document text
- https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073092d1084e---bidajuwowivutajerup.pdfIn PDF document text
- http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/8393079479.pdfIn PDF document text
- https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/9a09d2d8c27bbc3c98abd64c7fbda0f9/bokonoweleli.pdfIn PDF document text
- http://chistogood.ru/admin/ckfinder/userfiles/files/80332997216.pdfIn PDF document text
- http://bright-mineral.com/uploadfile/file/2021052718380231.pdfIn PDF document text
- http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3ccf66333---bufewo.pdfIn PDF document text
- https://usssecuritate.ro/userfiles/file/60327405180.pdfIn PDF document text
- https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606da4212c3d9---minexezujemupukut.pdfIn PDF document text
- https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c3ece2ee4---72919458553.pdfIn PDF document text
- http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/6fbec5996ad06a4692c3c8cb0de873f3/18832743406.pdfIn PDF document text
- http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a164b4a593c---95995396145.pdfIn PDF document text
- http://accessiblevehicleservices.com/userfiles/file/tofinopo.pdfIn PDF document text
- http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078d0a1ba458---74372966452.pdfIn PDF document text
- https://cmsschoolkg.org/userfiles/file/360739967.pdfIn PDF document text
- http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e546149f1---17236222187.pdfIn PDF document text
- http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a255809c62c---28685153028.pdfIn PDF document text
- http://fashioneducation.ru/userfiles/file/21374811175.pdfIn PDF document text
- http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/7tq34gas736e6eq7jiev790fe3/72202324729.pdfIn PDF document text
- https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/84j7l3ooni0v2o1v18s37amc12/89136007360.pdfIn PDF document text
- http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a20c68a319e---nedapemaxasoligubo.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_off0000eefa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEFA	10712 bytes
SHA-256: `7a9ccf18b2641e5b264bc90a2a60626e1970113e17f83b3b249d0c581f9faf37`
`font_01_sfnt_off0001076d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1076D	28792 bytes
SHA-256: `b8e52b039f1fc68c2a93f4e189dc7dea70f029732be37badad47674281fe5d7d`
`font_02_sfnt_off00014176.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14176	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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