PDF malware analysis — malicious · 5e1c02a7a6498b3b

MALICIOUS

PDF

66.8 KB Created: 2021-08-27 22:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: ffa678f340f655a355105fea8b4d455c SHA-1: 33020c3699b0bac6ff6bdf90253fa05d9e4b23b6 SHA-256: 5e1c02a7a6498b3ba166c169b1d24acde5af187be22404f69989ae4a7eab0b66

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ClamAV and ML classifiers, and exhibits characteristics of a link farm. It contains numerous links pointing to compromised websites, likely intended to lure users into downloading further malicious content or engaging in phishing activities. The presence of external URIs and link farm heuristics suggests an attempt to distribute malware or facilitate phishing campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.5231

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://martabaktelor.com/contents//files/85101886261.pdf In PDF document text
- http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83884318123.pdfIn PDF document text
- https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f22f888537---14459879439.pdfIn PDF document text
- http://leakefamilyreunion.com/clients/63964/File/53145085463.pdfIn PDF document text
- https://alpinashop.bg/files/21213178963.pdfIn PDF document text
- https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/aeucnjt462t0sqq9sgig3fkugq/fefaziwifimo.pdfIn PDF document text
- http://ytbozhuo.com/upload/file/120132552366.pdfIn PDF document text
- https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a6ee40696---31529759544.pdfIn PDF document text
- http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea06bb915b---savidavanuje.pdfIn PDF document text
- https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/nurugopofujekovofifipu.pdfIn PDF document text
- https://trimix.bg/UserFiles/File/pebojasetajuwuxez.pdfIn PDF document text
- http://jtipartner.com/ckfinder/userfiles/files/tusuwozevirujo.pdfIn PDF document text
- https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/37655dc51cb6b590d09769d43ed58076/wutunixikotosero.pdfIn PDF document text
- https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/bf6d23b5e9b5db315cebe7dfe3c5630b/xupumora.pdfIn PDF document text
- http://1careglobal.com/upload/files/dewifukuwivafisebuvixina.pdfIn PDF document text
- https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/73261c35b17a0ce695898f3de14b3894/32764607083.pdfIn PDF document text
- http://geoplan.su/userfiles/file/60839067813.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16078a71d10f7b---sisilosofodu.pdfIn PDF document text
- https://yellowstonewildlife.com/razudozulinofidokimefub.pdfIn PDF document text
- http://diacritic.org/travel/app/webroot/img/files/takasenapobifupezujo.pdfIn PDF document text
- http://hanleyresources.com/images/gafozufukaboseroxizebulop.pdfIn PDF document text
- http://aiswaryamatrimonials.com/fck_uploads/file/tojuzovetubale.pdfIn PDF document text
- https://www.alapan.org/fckimages/file/fifosipusuzisofuferodero.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=general+worker+cover+letter+with+no+experiencePDF link annotation
- https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/61ad0f83443cedf6b36e45345d3a8e81/sadogubowo.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_off0000beb4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBEB4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d6c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6C6	16220 bytes
SHA-256: `217ed17a8bf49324e8af63a4cc8bc29da704122bb483d7ddd25d1e8ca0d34b33`

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