MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
Heuristics 7
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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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=biology+class+10+textbook+pdf PDF link annotation
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a84232f104f---79222683201.pdfIn PDF document text
- https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/e0aa7b9e45004f3fe5dbee0413f24e49/vederixugorag.pdfIn PDF document text
- http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a42882ddea2---27550851616.pdfIn PDF document text
- https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753e2f08105---farutipisidixozako.pdfIn PDF document text
- https://textosolutionslinguistiques.ca/upload/editor/file/wilalil.pdfIn PDF document text
- https://equator-maritime.com/userfiles/file/75339418881.pdfIn PDF document text
- http://cukrarnakolbaba.eu/obrazky/files/niwodusoxujoxeritopoverip.pdfIn PDF document text
- https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/mg2j1af9f7o07o5isq0d9c7vbh/toxusulofojofivabemivoge.pdfIn PDF document text
- http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b19c1988268---vijuduxilupiwabo.pdfIn PDF document text
- https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/a10da5bb7f142e84a346f2691f33bfe5/pinotivivigobaseku.pdfIn PDF document text
- https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/5c061805ab7e7882284a6f65f2006853/27466075258.pdfIn PDF document text
- http://muzeumostrowiec.pl/obrazy/file/paxopusikasuxo.pdfIn PDF document text
- https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160838289007b8---pidakumanokimuxitesav.pdfIn PDF document text
- https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b911f59366---21682365636.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000b539.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB539 | 5524 bytes |
SHA-256: 6934f6eb0eb131d00a7e6eea7403943b6974b36584ba4fc0f677735c45b409ea |
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font_01_sfnt_off0000c816.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC816 | 10756 bytes |
SHA-256: 483b63ab2df312086882b4061e9dbe5e95e46732403c5ec3544135b6bed17f32 |
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font_02_sfnt_off0000ec86.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEC86 | 4324 bytes |
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176 |
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