PDF malware analysis — malicious · b20873985bfd4d96

MALICIOUS

PDF

76.2 KB Created: 2021-07-15 21:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 27e75c82649de68a11d2134b35e7e2ab SHA-1: 7411a85953f3a224a747227c14fdae0a9d0a922d SHA-256: b20873985bfd4d968218a75697be2cf7e746641bff993445486354a2271245e2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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
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://philabc.ru/uplcv?utm_term=holt+assessment+selection+test+answers PDF link annotation
- http://abimobiliare.pl/pliki/File/41441788590.pdfIn PDF document text
- http://www.anieliasfx.com/uploads/textareas/file/rupatok.pdfIn PDF document text
- http://darienhigh69.com/clients/866565/File/galevafebafimoregu.pdfIn PDF document text
- http://haverfordhigh77.com/clients/e/e7/e7c5a96ea35a64a1345a575153f12e7e/File/dutisumal.pdfIn PDF document text
- https://cutandcolorparrucchieri.it/file/fidimudowopu.pdfIn PDF document text
- https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/4a435ed18e015df07d32af06c85e85ce/9307158220.pdfIn PDF document text
- https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/l4nu0kpgamorkdfh1og2qo475c/85494711665.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb93562d2bc---dotabujurumewupuwu.pdfIn PDF document text
- http://aa-nusd.jp/4833339472.pdfIn PDF document text
- https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecb6e8e568---kizikorusanemiteme.pdfIn PDF document text
- https://pharmawell.eu/ckfinder/userfiles/files/60549516757.pdfIn PDF document text
- http://dentherapia.hu/files/file/46653756299.pdfIn PDF document text
- https://mecaniquekd.ca/upload/file/zorati.pdfIn PDF document text
- https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/ef40be96b6743e19c8e3cb95308b6593/vetolosefamisatosadisegir.pdfIn PDF document text
- http://tele-video.ru/upload/files/28284009589.pdfIn PDF document text
- https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713b76b64aa---vupirilapafej.pdfIn PDF document text
- https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/0725690e5c2b77fb9d6240f209e07c5c/64640024014.pdfIn PDF document text
- http://eugensa.lt/app/webroot/uploads/userfiles/files/74794247356.pdfIn PDF document text
- https://hondamienbac.vn/userfiles/file/fipirizavagoxubumujapezod.pdfIn PDF document text
- https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/a81d5b5bc5e4d3f1395d7a1f59190598/1540687754.pdfIn PDF document text
- http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/51e2d8e84d52c899bf71fbce8f381365/25168784455.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/0f2f50c27cea057acc7f39659601f362/9589279245.pdfIn PDF document text
- http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a378dfe408a---gurinifuzamadelonu.pdfIn PDF document text
- https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/hmng29f3hsenhj9q92k0c04rg3/vowekatonobeb.pdfIn PDF document text
- http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/9qa9hnf2053rgj2uioi3oq92p5/wuzimasekamugetowanefasib.pdfIn PDF document text
- http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a7403d42d21---9960429453.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_off0000c96a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC96A	10468 bytes
SHA-256: `0b49a6dbdeda9e66f353db3c6bfdc897f921e36cd8661fe357589d308fcbe1f6`
`font_01_sfnt_off0000e133.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE133	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f945.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF945	16272 bytes
SHA-256: `cb162d4fd80f770d2bf86e52bb0867e9f4dc2d9cf73e05135e253c89a86cfb4c`

Open this report in the interactive analyzer, or submit your own file for analysis.