MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file is a PDF that has been flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains numerous embedded URLs, many of which point to compromised CMS upload directories on various domains, suggesting a link farm designed to obscure the ultimate destination. The presence of these links and the nature of the detection indicate a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9833
Heuristics 6
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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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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://chcial.ru/uplcv?utm_term=auto+tune+apk+mod
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16143455266f6d---9544525782.pdf
- http://haiqi-machine.com/d/files/86106839914.pdf
- http://archidaldegan.eu/userfiles/files/61350642936.pdf
- https://sporyolu.com/resimler/files/49590947943.pdf
- https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/c2d4027684e7073c4ec112a1e669d916/lupano.pdf
- http://pxmonastery.org/CKEdit/upload/files/60349135902.pdf
- http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/xaduzobon.pdf
- http://csc0898.com/userfiles/file/20210916222821_5ee2er.pdf
- http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/161402fad481f5---bemuziwireleginalaruvobo.pdf
- http://goldway.jp/upload/board/file/lerurevefuk.pdf
- http://modelseafarm.com/kweb/ckfinder/userfiles/files/76307093246.pdf
- http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161373df44c46a---80897414385.pdf
- http://baove24h.info/upload/files/44332058856.pdf
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161368625dd567---69569580555.pdf
- http://z-sinpro.com/upload/files/megavakotulagekojo.pdf
- https://thefertilizergranulators.com/d/files/lutefedi.pdf
- http://cachnhietwin.com/luutru/files/53973211278.pdf
- https://consurs.ro/ckfinder/userfiles/files/fofilimonot.pdf
- https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/dp8ro76v0ka9daaufqud0b55v2/saxumofenigemadur.pdf
- http://attlas.center/userfiles/file/29949201062.pdf
- https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/wozabokilisitededabuzaki.pdf
- http://rancholasmonturaspremios.com/campannas/file/75652256330.pdf
- http://donovaly-ubytovanie-safran.sk/web/userfiles/file/65746789891.pdf
- https://shen-su.eu/gfx/userfiles/files/pukif.pdf
- https://sakkestadbil.no/userfiles/file/49103560524.pdf
- https://cvssteelex.com/ckfinder/userfiles/files/49701126920.pdf
- https://matricula.arendic.cl/files/86763136577.pdf
- http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44611727183.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_off0000ddf7.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDDF7 | 16792 bytes |
font_01_sfnt_off0000f609.bin04e3a68fa615c5849ebd5ee078c259298c20ffc9d3ef5b24a628a727ba2aa266 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF609 | 17480 bytes |
font_02_sfnt_off000122f7.bin1cd6441c31b0d0d3ecd65639c171983b0adf41f972abfa3a321c3cefe496da6a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x122F7 | 10320 bytes |
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