MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file was flagged by multiple heuristics as a link farm, with numerous external URIs pointing to potentially compromised or disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, lacking clear user-facing content but containing numerous embedded URLs that likely lead to malicious sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9982
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://crysiq.ru/uplcv?utm_term=bloatware+removal+tool+android
- http://grupopiscis.com/upload/files/6902789816.pdf
- http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/64dcd983bc5a70e114201b09c0cdb60b/69126583240.pdf
- http://taociren.com/upload/file/210911020343773501j6gor8ua9onc.pdf
- http://chochosanencino.com/uploads/files/42299287829.pdf
- http://jatyn.cn/upfiles/202109/file/1631233679.pdf
- http://michalpavlicek.com/uploaded/file/gefejageboratadad.pdf
- http://aotwresort.org/ckfinder/userfiles/files/5057955707.pdf
- http://maquinandoysubastando.com/dleyes/admin/fotos/file/76059531168.pdf
- http://xaydunganphubacninh.com/webroot/img/files/duvanevekijeforigewat.pdf
- http://kapelski.pl/userfiles/file/mibaturo.pdf
- http://tikatalog.sk/_files/file/6326304312.pdf
- https://store-connector.com/_upload_bilder/_filemanager/file/wogimovuzinijovozovadidu.pdf
- https://kamionosnyelvlecke.hu/userfiles/file/xekibosubazejevukunotopax.pdf
- https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/mgjpq15l4912372446af207if5/soviwojipupiwomujaforobo.pdf
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132af5726735---vavojopotirebesim.pdf
- http://vanhacollection.com/images/files/16560866240.pdf
- http://pobierzplik.pl/uploads/files/8715202728.pdf
- http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/givuzeninonorigufuwax.pdf
- http://autokolcsonzoszolnok.hu/admin/fck_upload/file/67696378783.pdf
- http://artattack-concerts.de/files/file/rovabagakow.pdf
- https://jewfri.kr/files/image/files/81957418590.pdf
- https://ntiverification.com/userfiles/file/lezamemi.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_off0000b1f6.binbbfc34db57642926f7caa4b92ad4c8097a16816f787375c404945b53dfc27cc1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB1F6 | 14640 bytes |
font_01_sfnt_off0000d6a4.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD6A4 | 16792 bytes |
font_02_sfnt_off0000eebb.bin2c4e2b5c61282b1bdd1c5e67f04e7540f363bcff30cfa89ff6155c3117f230d7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEEBB | 10444 bytes |
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