MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites, some of which are WordPress uploads. The embedded URLs, such as 'https://krisoc.ru/uplcv?utm_term=add+contact+to+whatsapp+android', suggest a lure to trick users into visiting potentially harmful sites. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9992
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://krisoc.ru/uplcv?utm_term=add+contact+to+whatsapp+android PDF link annotation
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c1865f53b---mijedasij.pdfIn PDF document text
- https://hasekei.jp/userfiles/file/10698894333.pdfIn PDF document text
- http://kondicionery-dolgoprudny.ru/upload_picture/file/11521997971.pdfIn PDF document text
- http://porpora.info/imagenes/imagenes_contenidos///daxivitipugasotezipapule.pdfIn PDF document text
- http://ylgems.com/file_media/file_image/file/tukuxakiduwizigufevevi.pdfIn PDF document text
- https://kompaspt2.com/contents/files/56463599202.pdfIn PDF document text
- https://tigapilar.com/upload/files/lazam.pdfIn PDF document text
- http://guchen.ru/d/files/93690313942.pdfIn PDF document text
- http://alrabbancapital.com/file/files/bowokeweredete.pdfIn PDF document text
- http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/kubemibisoririredaxoke.pdfIn PDF document text
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326afa6d40e---82216058930.pdfIn PDF document text
- https://tonmathunglan.vn/upload/files/77188857721.pdfIn PDF document text
- http://jjw-led.com/userfiles/file/13460691898.pdfIn PDF document text
- https://ptkas.com/kingkong/userfiles/files/kezogakigetuzo.pdfIn PDF document text
- http://rivebistro.net/ckfinder/userfiles/files/43544859293.pdfIn PDF document text
- https://aedwea.com/upload/foto/64946262535.pdfIn PDF document text
- http://cegled.varosom.hu/userfiles/files/wemokurajoboxeg.pdfIn PDF document text
- https://peterdegendt.be/file/rukaveruxu.pdfIn PDF document text
- https://kingdomdatesuae.com/userfiles/files/takowedofememarevo.pdfIn PDF document text
- https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161420d5232e3e---73867267770.pdfIn 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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000cea9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCEA9 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000e6c0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE6C0 | 10500 bytes |
SHA-256: 85eb4954a27f61dfb60898681bf2d82902797266090ce3b484d1c64160a1e500 |
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font_02_sfnt_off0000fea5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFEA5 | 16832 bytes |
SHA-256: 29749c896751118405a628863f9e7e7c300b39d4a2233f82ac56243af2341876 |
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