MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.
Machine Learning
- Nyx PDF Classifier malicious score 0.9941
Heuristics 7
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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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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://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/76c3cb91f1b53558877adc62eb891954/31330347356.pdf
- http://msslink.ru/userfiles/files/diwajuzuzejesom.pdf
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ce4e24b0dde---lutuwiwamosunokofezoxifob.pdf
- https://cowichanmusicfestival.com/userfiles/file/49396784815.pdf
- https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8a092e271---862271392.pdf
- https://led7.ru/file/89742409475.pdf
- http://visit-pune.com/userfiles/file/62710668068.pdf
- http://domholidays.com/userfiles/file/18370803486.pdf
- http://kaizousha.com/js/upload/files/jupotijenidoj.pdf
- http://bidhichand.org/sahodyatarntaran/userfiles/file/volelenagapedalabizuwipox.pdf
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/o2uvkl1k0teduiuc4s4u8tu9n3/xanojeronemol.pdf
- https://serka.com/serka/upload/files/92820083415.pdf
- http://moscowprice.com/content/xuploadimages/file/43487055630.pdf
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/74f42571d442026bf9aa0e87221930b1/bazobukemebidole.pdf
- http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df704051da7---94599199204.pdf
- https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e00497c3f71---25421054140.pdf
- http://globalquestconsulting.com/userfiles/files/zukoliwajakegerisepokemek.pdf
- https://allcreaturesinc.com/files/files/fejilekuwimojasekone.pdf
- http://28777886.com/Lpf/UPFILE/userfiles/files/70091244940.pdf
- https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/5ceb02604de64e7ca91c3924cbe86f28/73439401886.pdf
- http://tz5168.com/uploadfile/image/2021/06/17/file/20210617_155006_184.pdf
- http://anhuifan.com/upload_fck/file/2021-5-20/20210520154209744064.pdf
- https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=ize+meaning+suffix
- 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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000edd2.bindd2aa777c13ae053fc65ddc82d9c2720eb30b60e605bd374bfbec72a86844e36 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEDD2 | 18380 bytes |
font_01_sfnt_off00011e22.bin660af9f2641befc7710878aad2659b82f476f17d945abefdce40111b4746b8b9 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11E22 | 10408 bytes |
font_02_sfnt_off000135a8.bin58194a7f9067ae332b28b3b73301d2d22f83c44e27c2c7e4607a07cf28c4579c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x135A8 | 5132 bytes |
font_03_sfnt_off0001478f.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1478F | 16792 bytes |
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