PDF malware analysis — malicious · c7dc7941a0c97172

MALICIOUS

PDF

63.7 KB Created: 2021-04-14 13:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 2417e475c613197f7ea1f9a3e88823b6 SHA-1: ea59e8347ab71dc20eee3893ebb418bc595be65e SHA-256: c7dc7941a0c971723ea6b0980cc2d90946d711006dcf7289ced6d846f1b618cc

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9776

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://cicatsalud.com/html/sites/default/files/webform/15691680518.pdf In PDF document text
- https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/zizepuniket.pdfIn PDF document text
- https://www.jsif.org/sites/default/files/webform/vinuriruxelapaviwona.pdfIn PDF document text
- https://www.jwico.com/sites/default/files/webform/xojisipet.pdfIn PDF document text
- https://www.a1touchsolution.nl/sites/default/files/togivem.pdfIn PDF document text
- http://cicatsalud.com/html/sites/default/files/webform/99368311749.pdfIn PDF document text
- http://russian-ice-spb.ru/sites/default/files/webform/files/40307308503.pdfIn PDF document text
- http://seiary.com/sites/default/files/webform/rec/11252708720.pdfIn PDF document text
- http://oaklandchildcare.org/sites/default/files/webform/zomosazufexebale.pdfIn PDF document text
- http://cicatsalud.com/html/sites/default/files/webform/28693943460.pdfIn PDF document text
- http://russian-ice-spb.ru/sites/default/files/webform/files/zatepatepekaberemosigedix.pdfIn PDF document text
- https://vectorcorp.net/sites/default/files/webform/resume/92207600326.pdfIn PDF document text
- https://www.blplegal.com/sites/default/files/webform/lolavojirubopikumu.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=automation+anywhere+interview+questiPDF link annotation
- https://umatter.princeton.edu/system/files/webform/requests/72435273025.pdfIn PDF document text
- https://www.healthdata.org/sites/default/files/resumes/sametuzovu.pdfIn PDF document text
- https://www.healthdata.org/sites/default/files/resumes/58023923203.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f0ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0FF	5260 bytes
SHA-256: `0e3be69c6c0ebc438d5114249156b99d388691c679e78381befba1dac0598581`

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