PDF malware analysis — malicious · 01646c0ec7cabd4d

MALICIOUS

PDF

77.6 KB Created: 2021-07-23 03:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 96e82f30982260774d7e3728e384d7d3 SHA-1: 9e5d0c5195a11880c33beea8402bf231f6c3315e SHA-256: 01646c0ec7cabd4d608a656225829170eb689a9a3b43c0c82582bc088eef17ba

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage, suggesting a phishing or redirection scheme. The embedded URLs, while some are marked benign, are part of a larger pattern of directing users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.6583

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 http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7f5b84a32---25477770128.pdf In PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090718a3bb24---89989574982.pdfIn PDF document text
- http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ad33801e41f---waziwajasowukazomodu.pdfIn PDF document text
- http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d789cf3333a---powuzajame.pdfIn PDF document text
- https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/tnvgktiqf5takhqgjr6n8et8ug/popoxotatitiwuzajivev.pdfIn PDF document text
- https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edee7aaf704---48526373193.pdfIn PDF document text
- http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c99d021a64---82920276701.pdfIn PDF document text
- http://rajhansnursery.com/userfiles/file/jexuwaki.pdfIn PDF document text
- http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/4d882c37cd98c6cf4e5f9b8556008a64/muponuxififesupodegokob.pdfIn PDF document text
- https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/51829e05fba313b62a26e91d639074c4/99042136281.pdfIn PDF document text
- http://doo-san.com/userfiles/file/20210512094440.pdfIn PDF document text
- http://abacusnancy.com/userfiles/file/kigolizifuzofovebavigizi.pdfIn PDF document text
- http://dorapeyzaj.com/userfiles/file/nelejusi.pdfIn PDF document text
- http://nuraski.pl/wsg/userfiles/96557939601.pdfIn PDF document text
- http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/a0gpd51b94etf579rv5367uln1/pivujevexawozaluxekog.pdfIn PDF document text
- http://redfordunion70.com/clients/869360/File/58222525367.pdfIn PDF document text
- https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/8c4736b1104235c1ecf1e009f4b9a2b7/gimurebapidut.pdfIn PDF document text
- https://biocoils.com/img/file/80994105389.pdfIn PDF document text
- http://epmachine.ru/d/files/zoxubaliru.pdfIn PDF document text
- https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/lucs626h7ednv9jg710hfgdvg2/gibofiguremidusijurezad.pdfIn PDF document text
- http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160789b2f0b0be---senubo.pdfIn PDF document text
- http://sgyscom.com/upload_fck/file/2021-6-10/20210610224845437020.pdfIn PDF document text
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8b46e818e---gopidawuzatev.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=yugioh+top+trap+cardsPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ef5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF5B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001076d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1076D	17528 bytes
SHA-256: `6e86a27e5c9c0862eb8692d6ab20a4d8fa91bee169ea7edcfe3c63cf2ec59093`

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