MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The presence of embedded JavaScript and a link farm pointing to multiple distinct hosts, some of which are associated with compromised CMS uploads, indicates a malicious intent. The ML classifier and ClamAV detection strongly support this assessment. The embedded JavaScript likely serves to execute malicious code or redirect the user to a malicious site.
Machine Learning
- Nyx PDF Classifier malicious score 0.9935
Heuristics 7
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF 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.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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Embedded URL info EMBEDDED_URLOne 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://unicaconsultoriarh.com/images/files/33469795607.pdf
- http://gzcaifeilai.com/ckfinder/userfiles/files/202109022034348271.pdf
- http://logisticsnetworks.net/ckfinder/userfiles/files/99120399871.pdf
- http://antitumor.org/filespath/files/20210914163148.pdf
- http://bezpiecznamlodosc.org/files/file/xavigiz.pdf
- http://senvietsystem.com/ckeditor/upload/files/ziniwexijotulidazelusa.pdf
- http://quaretti.it/userfiles/files/pazoru.pdf
- http://dijladentalcenter-qa.com/userfiles/file/jupatinefunosumoxebagupi.pdf
- http://stavclearing.ru/upload/files/49297776052.pdf
- http://xn----7sbndn5at.xn--p1ai/uploads/files/lugunuzuzaled.pdf
- http://wingmanresearch.com/userfiles/files/6368805903.pdf
- http://balaton.varosom.hu/userfiles/files/ralujefuboze.pdf
- http://aaas.handyfriendship.com/upload/files/misusugijabimo.pdf
- http://nzozkrowodrza.pl/uploads/editor/file/55897274749.pdf
- http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/vorugoremidonu.pdf
- https://xn--80aesyq.xn--p1ai/files/file/3356701046.pdf
- https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/6shcoos8fsn6sacbevj3dvnuo2/34978056238.pdf
- https://afgventuregroup.com/cfiles/file/95422335590.pdf
- http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/3cm06v1pthsjj17ucudfv3mep3/48355644511.pdf
- http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3bf8cfac3---mubulexofi.pdf
- http://tafgambiatours.com/userfiles/file/pobavorewomod.pdf
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=super+backup+and+restore+pro+apk
- https://mediacentre.heathrow.com/js/ckfinder/userfiles/files/kivitafofufuvaworeg.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 5
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000ca10.bin080d017b497a1292edd02ed0242d8d6b6700df015b501d2011d39496637bd1a4 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCA10 | 16224 bytes |
font_01_sfnt_off0000dff4.bin9d2bb2d94384256bb38bab4c3005c13f44a8b25eb5b232dcefe64ad24aae4b51 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDFF4 | 1868 bytes |
font_02_sfnt_off0000e8ab.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE8AB | 16792 bytes |
font_03_sfnt_off000100bd.binbee0efcb8f77a4b11e726b820e56ee289d926eca88911e1c2334099645187ddf |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x100BD | 23536 bytes |
font_04_sfnt_off00013bf1.bin66d89e0c6bc88c95a9e5fdc43d5ff5b48d6f3df6a80b0ff45b3be7a5181950f5 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13BF1 | 10776 bytes |
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