PDF malware analysis — malicious · a6bde44b39346b65

MALICIOUS

PDF

74.8 KB Created: 2021-09-11 20:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: e0819bfcb8a9c658a1fb10949791b5d6 SHA-1: 29a2596d5748dae3dda4fbac6a5cb856659e52c7 SHA-256: a6bde44b39346b65c40f4bda4f636ae245a9cff23ddf31c116114fe532c7f758

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected by ClamAV as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and link farm indicators further supports this attack pattern.

Machine Learning

Nyx PDF Classifier suspicious score 0.4706

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://crysiq.ru/uplcv?utm_term=best+hidden+screen+recorder+app+for+android PDF link annotation
- http://an-professional.ru/img/files/file/32717911115.pdfIn PDF document text
- https://gornjastubica.hr/files/65610889727.pdfIn PDF document text
- http://www.hausbaumesse.at/ckfinder/userfiles/files/jiporumewolosodunabu.pdfIn PDF document text
- http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a207f4a470---4333711967.pdfIn PDF document text
- https://tomaszbizon.tomaszbizon.pl/web/uploads/files/mazawabiwatonuwafazefu.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fab33c89a9---75213468971.pdfIn PDF document text
- http://irinabailey.com/upload/files/nufilabiduji.pdfIn PDF document text
- https://kawanmto.org/contents/files/besumibamigakekukumigarej.pdfIn PDF document text
- https://htlexpress.com/ckfinder/userfiles/files/kowalipabusepilewiba.pdfIn PDF document text
- http://aytekinpolatel.com/image/files/59165971299.pdfIn PDF document text
- http://tranhdaquydep.vn/upload/files/12026017165.pdfIn PDF document text
- http://sun-eko.eu/files/file/sufokujowofugane.pdfIn PDF document text
- http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/81895909924.pdfIn PDF document text
- http://duhochoangthanh.com/upload/files/figamenifoxel.pdfIn PDF document text
- https://10s317.com/uploads/files/202109091400251146.pdfIn PDF document text
- https://aromamarketing.md/img/files/wikimuzedebimup.pdfIn PDF document text
- https://theatresaucinema.fr/uploads/file/xopesekidonikararapafume.pdfIn PDF document text
- http://gradn.ru/uploades/fckeditorfile/jutovoxexasutelaxapaf.pdfIn PDF document text
- https://master.plus/wp-content/plugins/super-forms/uploads/php/files/51587a7033c69131463c8ff20ac4db42/95743154400.pdfIn PDF document text
- http://koreaseowon.com/ckupload/files/20282569910.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d8a21e78f---wilakitubirax.pdfIn PDF document text
- http://sictombbi.fr/ckfinder/userfiles/files/89803451608.pdfIn PDF document text
- https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5b1eeecfd---97570061303.pdfIn PDF document text
- https://asiantms.com/ckfinder/userfiles/files/gulaxanofeku.pdfIn 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_off0000cef8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEF8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e70f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE70F	10724 bytes
SHA-256: `1ace25d5787f834d944643bb25694dca9d48011a7b3d66ab7b85ecd0efff58f5`
`font_02_sfnt_off0000ffa3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFA3	17528 bytes
SHA-256: `0a6d84750b7e4fdb8d62dcf6dbc0f1535e2d28fb620079061497311e78f42376`

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