MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to numerous disposable domains, many of which are hosted on compromised WordPress sites, indicating a phishing or malware distribution campaign. The ClamAV detection and ML classifier further support its malicious nature.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
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 https://crysiq.ru/uplcv?utm_term=positive+adjectives+that+start+with+y+to+describe+a+person
- http://abbwingslynnhaven.com/uploads/files/mufovupewasoguxasike.pdf
- http://ddaengshop.com/ckupload/files/zeforalilegodamoraloz.pdf
- http://sigmabhp.pl/userfiles/file/35036163617.pdf
- http://vytvarnyobchod.cz/UserFiles/File/limoremopar.pdf
- http://boki.hu/editor_up/25818251572.pdf
- https://vibanghanoi.com/uploads/files/72533070228.pdf
- http://fairbank-ia.org/admin/ckfinder/userfiles/files/74882719183.pdf
- http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613361c138353---busuxotilen.pdf
- https://dienhoanghean.com/upload/ck/files/25275141063.pdf
- http://flexinform.com/hirlevel/file/1085082352.pdf
- https://happy-playground.gr/uploads/_uploads/files/zixosujuxesoxuxorenupel.pdf
- https://huaienclinic.com/uploadpic/files/51264007623.pdf
- http://www.gobarging.com/uploads/textareas/file/71359196769.pdf
- http://www.mananthavadynorbertines.org/www/js/ckfinder/userfiles/files/jakumu.pdf
- http://strategie-online.net/catalogue_dynamique/file/48977605039.pdf
- http://cluboutletmoto.net/campannas/file/jidejowugowamof.pdf
- http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/60e8a67ad7fab301bc8c93e38818a1bd/rodefuwuvidu.pdf
- http://orderbestwings.com/uploads/files/21678414315.pdf
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144bc85e1e7f---porikudikuxone.pdf
- http://studiolorenzino.eu/userfiles/files/bupixilewodelusad.pdf
- http://leguido.net/files/jodusuw.pdf
- http://studio70.eu/userfiles/files/jovutokixeranakelagafawi.pdf
- https://optimustelecoms.com/ckfinder/userfiles/files/lepabofukavemuvavajo.pdf
- https://coolinterier.sk/upload/files/15032297339.pdf
- http://sanfrancescovet.com/userfiles/files/58537269937.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000d635.binc8b49fe229321c206a27659da1653e3772117fc193da0b5061ac927f0187ba02 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD635 | 11104 bytes |
font_01_sfnt_off0000efe4.bin49aa0adadf44c9c89ddd089c0b89017611f04b2d45020109bb76976a4ffcc1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEFE4 | 18340 bytes |
font_02_sfnt_off00011e88.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11E88 | 16792 bytes |
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