MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely serving as a distribution point for phishing or malware. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9943
Heuristics 6
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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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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=physics+principles+with+applications+pdf+free
- http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16858372e7---gonofalewaduxavakojebig.pdf
- http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608fad720f445---48902618718.pdf
- https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/b44777abfb40869acac9e4b95c3ae9b6/2341268917.pdf
- https://canevastoilestjean.com/upload/editor/file/80609804680.pdf
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e42156997---fajakebezilapugar.pdf
- http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a676feda32f---41752155369.pdf
- http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609682e72f242---88181431329.pdf
- http://orderleesushi.com/uploads/files/minefu.pdf
- https://bbpartner.cz/userfiles/file/94717123987.pdf
- http://safarang.com/basefile/files/56481573655.pdf
- http://creativeindustries.ru/uploads/userfiles/file/dupitezaf.pdf
- https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb2458ed6f---19822659997.pdf
- https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16072ef4dc8c59---91496033549.pdf
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160709cb672b66---niwisudo.pdf
- https://akproauto.com/nbloom/fckuploads/file/32202149638.pdf
- http://videofilm-tv.ru/content/File/gafutitozafixuj.pdf
- http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/83963078594.pdf
- http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a79897ee768---87793253429.pdf
- https://caribemed.com/userfiles/file/72863612179.pdf
- https://ocw.tw/uploads/files/23873949394.pdf
- http://music-summer-courses.eu/upload/files/bifibanirunam.pdf
- http://hookmyweddingup.net/clients/73542/File/5025888224.pdf
- https://thekolkatapackersmovers.com/ckfinder/userfiles/files/jagob.pdf
- http://wsm.hk/images/files/borolekip.pdf
- http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ef50b58fc---20609965669.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_off0000cb9d.bin0c58e1af426a7df43e02b663877c75d896d17444c85d409ab89a627d8687957e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCB9D | 10916 bytes |
font_01_sfnt_off0000e4ee.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE4EE | 16792 bytes |
font_02_sfnt_off0000fd00.bindb37f41574889a0318409b93261dc9ce47b6fe40216be9ec2b6c95720b9712b3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFD00 | 16156 bytes |
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