MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or redirection mechanism. The embedded URLs, such as 'https://catamma.ru/uplcv?utm_term=hard+balancing+equations+worksheet+and+answers', are likely used to direct users to malicious content or phishing pages.
Machine Learning
- Nyx PDF Classifier malicious score 0.9985
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://catamma.ru/uplcv?utm_term=hard+balancing+equations+worksheet+and+answers
- http://lt101shop.com/userfiles/files/58880988812.pdf
- https://mecaniquekd.ca/upload/file/10369497469.pdf
- http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a56b1a3b0d7---wanagomut.pdf
- http://redactron.com/userfiles/file/87135671750.pdf
- http://iburgisidimarsala.eu/userfiles/files/dibovavaxunikovesojorepal.pdf
- https://efsanepin.com/calisma2/files/uploads/xazisagemidobifed.pdf
- http://cukorbetegshop.hu/files/15438171839.pdf
- http://unseenadventure.com/userfiles/file/bomotobawamadesegobabup.pdf
- https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f8119167123---49450453978.pdf
- http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161176da4bfa15---xalafalipixijagoxovo.pdf
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/5jquqr9cdtgqne5br0tfadft86/tevofemolorudewebawibiro.pdf
- http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/420c5aaa079376ec894a8bed141926c0/19413887378.pdf
- https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/6d84aacabf498b77a1f22805b7cbab2f/jisusorojegamonebesus.pdf
- http://solmoda.it/userfiles/files/53355409832.pdf
- https://cristalensi.com/public/File/52857566021.pdf
- https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/f9f1bbebaf9d491769b9d13326b5ba17/nigipobegogufid.pdf
- http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/obk9p0sc79e7v1rsntts75c382/47480651140.pdf
- https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/d05ba7e5deaabdb4ce152b6423a7e6ad/fopejokakitumaw.pdf
- https://anyimaker.com/upload/users/files/67649227482.pdf
- https://jiu-hang.com/upfiles/editor/files/96416757950.pdf
- https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/usa4jh13s291trlt302636ai4f/289372808.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_off0000d7b4.bin5d283543e56fdca853a49e0abac50fa01baf2f0e16e184008c1c62b56827c74d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD7B4 | 18308 bytes |
font_01_sfnt_off00010732.bin12ebdaff5d20efd375482cdd700b7e527754e2b446cdd03d956689acbdf3ad2d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10732 | 11204 bytes |
font_02_sfnt_off000120db.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x120DB | 16792 bytes |
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