PDF malware analysis — malicious · 7d5794f0fbe647df

MALICIOUS

PDF

78.0 KB Created: 2021-09-01 04:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: c941a625723815506fa9cd294a205584 SHA-1: de0d642640df255fb2ef86753dcc76b5daf44755 SHA-256: 7d5794f0fbe647dfc8723cc9629d041d5d4e2756be80edeb699aabc306529774

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to compromised WordPress sites, indicating it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.8511

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://krisoc.ru/uplcv?utm_term=i+love+your+kindness PDF link annotation
- http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16084d4a2ac063---28572503587.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/7c49538f4faac2f540570a90669a6029/warofejalosul.pdfIn PDF document text
- http://angelojrobles.com/admin_initial_test/userfiles/file/80778860338.pdfIn PDF document text
- https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/decafbbd4b2818179b38b884e422dccf/91960312573.pdfIn PDF document text
- http://paykaaluminiya.ru/ckfinder/userfiles/files/vizutovole.pdfIn PDF document text
- http://tvoirostov.ru/ckfinder/userfiles/files/dumilidoze.pdfIn PDF document text
- https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c465f62f94---rudaneketizuvejoluzuseg.pdfIn PDF document text
- http://naoshima-habitant.com/putakilunaxanilavatar.pdfIn PDF document text
- https://perfecthospital.org/FCKeditor/file/99231126099.pdfIn PDF document text
- http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbbce3a544---83178374034.pdfIn PDF document text
- https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/9d2aab8441b46f60fa88731039cb4b34/96027444831.pdfIn PDF document text
- http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083029835076---fixovajasikuv.pdfIn PDF document text
- https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160dbc67d4a0ff---kaxegepalefotoni.pdfIn PDF document text
- https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b6f2f789180e0ff3dade8b466e6392eb/92328353455.pdfIn PDF document text
- http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/14411023661.pdfIn PDF document text
- https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607666f162da1---wewepibutunudatepegomav.pdfIn PDF document text
- http://al-bandak.com/userfiles/file/22345039396.pdfIn PDF document text
- https://binarbaidservices.com/public_html/userfiles/file/kifufotokajolasonofujexuw.pdfIn PDF document text
- http://servis-hradec.cz/files/file/87237732950.pdfIn PDF document text
- http://lbtech.kr/upfile/files/73273670410.pdfIn PDF document text
- https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16127442e36727---77878830657.pdfIn PDF document text
- http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f3d003fcc---55947888109.pdfIn PDF document text
- https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/9101cd3a9d68578a04333aad331c3a71/zurifisepulijiwolag.pdfIn PDF document text
- https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/9ad0eb99579751f349693a4284b20f8a/joretikim.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_off0000e3cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3CB	18372 bytes
SHA-256: `6df9d3b1ab6fe52afdcdc82d1f3ad31b247758c9b1ffb85f40c2cc530e35e633`
`font_01_sfnt_off000112e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112E3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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