PDF malware analysis — malicious · 8f082ceaa5c3ec79

MALICIOUS

PDF

76.9 KB Created: 2021-05-01 06:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29

MD5: 4a7ec96c7e66cafb3f59f5f23f42d2bb SHA-1: 8406498a96f4cea60b9c6c202bd0305f279db322 SHA-256: 8f082ceaa5c3ec79647401d4cbb5a8ad64b18eed734093e8ac24db85587f0416

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to reference driver downloads, a common lure for malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/c6eb237050010731d6d1042276e91971/wunexake.pdf In PDF document text
- https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160822ceb8f9e8---febup.pdfIn PDF document text
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608418ceae859---51822315655.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/5jquqr9cdtgqne5br0tfadft86/tevofemolorudewebawibiro.pdfIn PDF document text
- https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/cef7f41006dfd3be65e1ba0f0be79ccc/35263670613.pdfIn PDF document text
- https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/fmm2s9h9ecgl6l7vspiro5ogm7/xuzuzujipo.pdfIn PDF document text
- https://acronimocostanzo.com/userfiles/file/92077619182.pdfIn PDF document text
- http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160778cd6bec80---woniguwigu.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608079894fe77.pdfIn PDF document text
- https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/fn91fu56p0jrin2b4reup776ki/rukixitowatidaxidedafuxur.pdfIn PDF document text
- https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/96904a0a5a26fd8e27ed82397dcbe388/kokim.pdfIn PDF document text
- https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/ab102b191c295091ddd13937330373e4/90616826082.pdfIn PDF document text
- http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b035647b9a---dimumupopiva.pdfIn PDF document text
- http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc24fc6118---vunibovut.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/885222882f5e675ef45ed878c13030b0/24240120736.pdfIn PDF document text
- http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160770104a9787---10398508779.pdfIn PDF document text
- https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/e097d0381787986164b8a85dccc8ffd9/78772033400.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=driver+bematech+mp-+4000+thPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000deb9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEB9	4996 bytes
SHA-256: `e4b451d153042a4eb7cbfcd5711dbe63b677907bd7584fb8e2b47f9fe9ec6682`
`font_01_sfnt_off0000efc6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFC6	13000 bytes
SHA-256: `b7df7a42eb060836aed6430db9368e14d48a738abbae9913bc5b87dd586b0a72`
`font_02_sfnt_off00011844.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11844	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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