MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories. These links likely serve as a lure to download further malicious content, aligning with a spearphishing attachment attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9848
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://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/405308bd5002ab816707e823aec97dab/35965519265.pdf
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1337c39a9f---dizumo.pdf
- https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/3ad4fe0f4733b59a2f5401ead2b455a8/43832960161.pdf
- https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16076e3efba8a4---13465615759.pdf
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160d03f1f7bf5f---5755846381.pdf
- http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac69267282---4855305825.pdf
- http://sushikyototogo.com/uploads/files/64814550050.pdf
- https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/ls0665hf8s07hik62nfjlsicm6/zopazuvujipa.pdf
- http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b49bb3c88---50187969653.pdf
- http://kwartetproforma.com/userfiles/file/18361636583.pdf
- https://binarbaid.com/public_html/userfiles/file/93790801235.pdf
- https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b0217b958---bikatorelef.pdf
- http://dentherapia.hu/files/file/95700810959.pdf
- http://chiaranannini.com/userfiles/files/jujid.pdf
- https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/86an54f8qi0lpc8t33in477a4s/tixapo.pdf
- http://solee.cn/ckfinder/userfiles/files/mazulidekitivamodenejanu.pdf
- https://electroagro.es/pub/files/vasuxojuki.pdf
- https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d6f8e844cda---79903578555.pdf
- https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/j0ps9unnnkv4ritm8llhg6bv96/65408247371.pdf
- http://studioguagnoni.it/userfiles/files/17054566335.pdf
- https://jordan.si/dokumenti/file/kubariwuromulategu.pdf
- https://sonarmusic.hu/up_image/file/70740178019.pdf
- https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea7a6a4648---89339001905.pdf
- https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/78ip2go50d37e25burd2p6te2t/77723325069.pdf
- http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/d0841eb178704a3181894483da868547/1829806522.pdf
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89d2ccb1d4---39302645938.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=quotes+on+new+day+new+hope
- 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_off0000f39f.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF39F | 16792 bytes |
font_01_sfnt_off00010bb6.bind4a1dce87536bc66ccfa1e0624c92904637d60c038d1bdf0baa596a3405ff054 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10BB6 | 10608 bytes |
font_02_sfnt_off0001241c.bin7f771e9cb739444475daf63afa85e787eb2a69724fa8c48ac979e65e95f60bd4 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1241C | 16608 bytes |
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