PDF malware analysis — malicious · 7b837dccd26720b7

MALICIOUS

PDF

42.8 KB Created: 2021-09-06 21:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 10a1ae3bc032b3953d603231908ce3e9 SHA-1: 6cc2d92ca5886abae44297e5dcc164517ef15dde SHA-256: 7b837dccd26720b7c0942c8178b952173b27024c1ec3eb2dcc34a04c7ad3ba0d

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The heuristics indicate the PDF acts as a link farm, pointing to multiple compromised or disposable hosting domains, likely for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.5889

Heuristics 6

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://aihr-iadh.org/uploads/FCK_files/file/jimigijufatekopodis.pdf In PDF document text
- http://colorfusion.us/admin/images/file/42605715407.pdfIn PDF document text
- http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d931a588d---pimudopobewu.pdfIn PDF document text
- http://aranykoronakft.hu/userfiles/file/sorobevuxive.pdfIn PDF document text
- https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/631b3b704e17a6e9437566ed589f600f/litimuweniputipawux.pdfIn PDF document text
- http://m-styleauto.com/js/upload/files/xoweferixapimivagodotaz.pdfIn PDF document text
- https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160d86c7ed6b8d---lowamuwegizopulujovu.pdfIn PDF document text
- https://equinox-e.com/upload/files/67584119094.pdfIn PDF document text
- http://self119.net/upload/userfiles/2021/06/files/210626182915.pdfIn PDF document text
- http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4563fbfc4c---jinovakefuxoromumow.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=insert+blank+page+in+pdf+online+freePDF link annotation

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