PDF malware analysis — malicious · 656c8faba8895926

MALICIOUS

PDF

72.1 KB Created: 2021-06-14 13:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 70bb1b9f01c9ef1cb7a9f28a04909b6d SHA-1: c4e2ffeeb41d23a1afaac42762562d2f9799b47c SHA-256: 656c8faba88959266881ffae5b885ad1af358c32ebf1237f69f837138f601e2f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure strongly suggest an attempt to lure victims to external sites for further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9046

Heuristics 5

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
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://allytemp.ru/uplcv?utm_term=black+white+wallpaper+aesthetic PDF link annotation
- https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/tecq891gp4rkl49rgnq1d7rbl1/vubabefegobikofivuxop.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608467cabdf3c---70464138584.pdfIn PDF document text
- https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b1963ff4e---fivedivapoxixegeloz.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2af26d3609---60689900531.pdfIn PDF document text
- http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/jiubi7okkb40idaud6e54tr5e5/73212986920.pdfIn PDF document text
- http://absolutelyneon.com/userfiles/file/30218434743.pdfIn PDF document text
- https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/1da53e13bf5aed7ff9ba6f6a1914e4a5/16684572370.pdfIn PDF document text
- https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160875b0f99583---27181276694.pdfIn PDF document text
- http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160875489ab891---tikowipavomajopisut.pdfIn PDF document text
- http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfed3eb7e7---63056251142.pdfIn PDF document text
- http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/2459512cde4e509fcf1ff81fdfa00b3b/dumajuxekatosodosizukex.pdfIn PDF document text
- https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d76d7cc13a---kufodufakekugidajojoveg.pdfIn PDF document text
- https://cape-electronics.com/media/file/nidod.pdfIn PDF document text
- http://vasvaripalmuzeum.hu/upload/file/16084623848.pdfIn PDF document text
- http://ats-dz.com/userfiles/file/82184992923.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160945b235a3f4---97116166973.pdfIn PDF document text
- http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/19367160064.pdfIn PDF document text
- https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/041bf1f41c7c7cb58afb3ca0ab2d1995/99342874103.pdfIn PDF document text
- http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae22607aea---30090194212.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e5df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5DF	2996 bytes
SHA-256: `f496f86a11ff617c726d61344f2e543c0e72a59926cac2823f14bfc7282fafe1`
`font_01_sfnt_off0000f089.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF089	5224 bytes
SHA-256: `b72eca24e5ea12deaecfde5d22b9b3116dbcb33bb1f910688a74d20ed3c51281`
`font_02_sfnt_off0001025e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1025E	9860 bytes
SHA-256: `b633e3829a464dca46914e5bcb8468caaa1ae213aca96128f847f34a561062d4`

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