PDF malware analysis — malicious · 496206b5d125906b

MALICIOUS

PDF

70.3 KB Created: 2021-06-27 11:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23

MD5: 3b64dea4e81cfba7467572940ab004d4 SHA-1: b94195972a863f58968cb58f2a93bd99553fbc97 SHA-256: 496206b5d125906b8fd943dc35162262bf8ea533c8edab6bc03b8e2f1e60547e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.8295

Heuristics 5

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
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://edu-family72.ru/content/images/uploads/file/94784319941.pdf In PDF document text
- https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/qp01hr9pgegp3kfvnupe2g61qo/41223210194.pdfIn PDF document text
- http://bahattinburyan.com/userfiles/file/dofufilemesimiwofowo.pdfIn PDF document text
- http://kardelendalgicpompa.com/uploadfiles/file/fufolakuwerebigoro.pdfIn PDF document text
- https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/cd92d8970a1a26df300bd54a1ea41a54/sibonedonigezus.pdfIn PDF document text
- https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f35879a5c---72500169883.pdfIn PDF document text
- http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608376a7a1767---lulosijigot.pdfIn PDF document text
- http://www.predia.cz/userfiles/file/muwazabuvixa.pdfIn PDF document text
- http://roocenter.ru/upload/file/nuburer.pdfIn PDF document text
- https://zanhotel.ro/beficientconsultingFiles/file/tojitewegegawe.pdfIn PDF document text
- http://alwaysfavorentertainment.com/clients/879371/File/20077931705.pdfIn PDF document text
- https://santchavarabed.in/ckfinder/userfiles/files/9419890029.pdfIn PDF document text
- http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e869776923---nasuvidada.pdfIn PDF document text
- http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a08eddac03---fabewi.pdfIn PDF document text
- http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e94b573827---66448309303.pdfIn PDF document text
- http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/dabfd787d5777938108aa603a026337f/18093555892.pdfIn PDF document text
- http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45dabefb50---xokorufogavuku.pdfIn PDF document text
- http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607164076acef---neropamovexapilisukesalef.pdfIn PDF document text
- http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/90408605852.pdfIn PDF document text
- https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/c70a5a4151aaf7a6bbd21e99f51c30a1/17621391103.pdfIn PDF document text
- https://warungmimpishio.com/contents//files/19433467487.pdfIn PDF document text
- https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/a294e0121e3579a6dd1ae39d4a032bbd/raxipu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=a+minor+scale+tabsPDF link annotation
- https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/c70b47d61647cf6bc51139df4e89cac5/18950919209.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_off0000db08.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB08	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f31f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF31F	10512 bytes
SHA-256: `6a82d6e78939fd340768c5a2caf7625a417356433123e1b076df90d7353defd6`

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