PDF malware analysis — malicious · 9c8f3d5c9ca2b52f

MALICIOUS

PDF

59.8 KB Created: 2021-09-01 08:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 015e1d9ceb4fbdaab15c6ec6421fdf49 SHA-1: b20139484c84e14ca39600c731014a727111e9f1 SHA-256: 9c8f3d5c9ca2b52fc05b65c4b2f5fc583d578dd15c68b71bbfbb8f239c8b4245

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs that point to a variety of websites, many of which are hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of link farm heuristics suggests an attempt to obscure the final destination or to leverage SEO tactics for malicious purposes.

Machine Learning

Nyx PDF Classifier malicious score 0.7591

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://synerhu.ru/uplcv?utm_term=free+download+how+to+win+friends+and+influence+people PDF link annotation
- http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/kovidetuvamoladum.pdfIn PDF document text
- http://randoquad72.fr/userfiles/file/weliperuvobufaw.pdfIn PDF document text
- http://chi-kara.net/userfiles/file/54546082606.pdfIn PDF document text
- http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/9d8cb755755a7f08a248f3853a2a037c/paremokazalakufisizanula.pdfIn PDF document text
- http://195exim.com/datas/files/gugaxafaxasen.pdfIn PDF document text
- http://ufnk.fr/app/webroot/files/file/davokafuxoxovusored.pdfIn PDF document text
- http://beastyenergy.com/userfiles/file/gukatutamogazilo.pdfIn PDF document text
- https://andrejc.si/files/file/14698278211.pdfIn PDF document text
- https://silverlabpupsforsale.com/userfiles/files/tifanixonevep.pdfIn PDF document text
- http://www.gc-antey.ru/ckfinder/userfiles/files/40278689590.pdfIn PDF document text
- https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/4dlkhanhq43g2nq8dt6b1stl87/23133719375.pdfIn PDF document text
- http://leprofit.ee/cmsfile/contentfiles/mopamavu.pdfIn PDF document text
- http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52e0788566---kusisolitidiwugagivakoxom.pdfIn PDF document text
- http://swvocal.com/data/se2/file/12947106821.pdfIn PDF document text
- http://world-green-hope.com/uploads/files/89280947961.pdfIn PDF document text
- http://ohmamakitchen.com/uploads/files/49513345095.pdfIn PDF document text
- http://coinproject.com/userfiles/image/file/pivatezokupuzusoxobunaka.pdfIn PDF document text
- http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/bc10e91b0a267148e4aef5621f7b5a12/jorenu.pdfIn PDF document text
- https://chornakorn-packing.com/ckfinder/userfiles/files/talosumujuvabarobofo.pdfIn PDF document text
- http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/810b11bd846bac68612288bcb3e58760/bolokilovaxebav.pdfIn PDF document text
- https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1c0417ca0---1037922493.pdfIn PDF document text
- http://labonscafe.com/userfiles/korito.pdfIn PDF document text
- http://klpa.net/userData/board/file/749497248.pdfIn PDF document text
- http://beerskiboot.de/img/upload/file/memaburokafujedu.pdfIn PDF document text
- http://sportschoolindex.nl/images/uploads/44048807235.pdfIn PDF document text
- 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_off0000bba8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBBA8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d3bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3BF	10880 bytes
SHA-256: `4d1c314b5b0982a2c194fe99445f2bd53057b45e69bbfadd6e7e73f9cd824353`

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