MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of external URI firings and the ML classification strongly indicate malicious intent, likely to redirect users to malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9909
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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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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://synerhu.ru/uplcv?utm_term=friv+bull+chase
- http://princeworldwide.com/multimedia/userfiles/file/rovedub.pdf
- http://cropscipublisher.com/files/upfiles/file/24724430881.pdf
- https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613715ed5c0b3---5955293213.pdf
- http://openendrep.com/userfiles/files/bujudeginuzivefiw.pdf
- https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613772b4be43b---23635132910.pdf
- http://massiimo.com/piceditor/file/lowigiruvalovijunateselo.pdf
- http://euromarkcreations.com/new/fck_img/file/14787780305.pdf
- http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/lezexeralu.pdf
- https://inwestorfinanse.pl/userfiles/file/99973612915.pdf
- http://all-premium.com/user_file/files/mezikazesovujoj.pdf
- https://dm288.rs/slicice/file/segujaloralosozodakokuve.pdf
- https://h16hr15k-h19hr37urn.com/contents/files/82519684107.pdf
- http://propertiesforrent.com/userfiles/file///92826710498.pdf
- https://manorhair.com/uploads/files/202109050751295875.pdf
- http://chayka-svg.ru/files/41162964705.pdf
- http://www.halpellet.hu/userfiles/files/pemokog.pdf
- https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/93076d19fc5664b03fe0ed61ceeaa6ab/sukajabu.pdf
- https://chorland-dining.com/webroot/editor-uploads/files/82854546483.pdf
- http://vitacanes.com/uploads/files/80698822640.pdf
- http://mfcwestenkwartier.nl/beta/userfiles/file/24710203371.pdf
- http://www.childofafrica.org/media/userfiles/file/60398085659.pdf
- http://chi-kara.net/userfiles/file/94220986429.pdf
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/4ed79a4e85c87039418df62e2415d24b/ziruk.pdf
- https://aaaxxion.info/images/file/sagevajopi.pdf
- http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134adb2483d3---82131690849.pdf
- https://eobliecky.sk/userfiles/file/37478974296.pdf
- http://basaritarim.net/admin/editor_resim/file/zejusanodize.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_off0000b77b.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB77B | 16792 bytes |
font_01_sfnt_off0000cf8d.bin20c1ed78221a02f8830d67928f5dc8b8eaf8d19b615a7fb863d1cb0d8b02ac88 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCF8D | 14912 bytes |
font_02_sfnt_off0000f4f3.bine6490cb99b552f5547646a87ea43348ff645029f4c82bc0f777c93437e7a46d5 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF4F3 | 10288 bytes |
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