MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains a large number of embedded URLs, many of which point to compromised CMS uploads and disposable domains. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious.
Machine Learning
- Nyx PDF Classifier malicious score 0.9950
Heuristics 5
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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://pistant.ru/uplcv?utm_term=elementary+linear+algebra+8th+edition+larson+solutions+manual+pdf PDF link annotation
- https://barrierball.cl/ckfinder/userfiles/files/84652177146.pdfIn PDF document text
- https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/6v0dv3npnto9s6hn7u40c1qetm/69594201301.pdfIn PDF document text
- https://kor.mycultureis.com/FileData/ckfinder/files/20210927_BE83D54E588EFECF.pdfIn PDF document text
- http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/629586ba8d8b819f60ae761cb1581ca1/gekajove.pdfIn PDF document text
- http://christopherdallo.com/file/sanowekusotufet.pdfIn PDF document text
- http://boxethai38.com/upload/file/94685378800.pdfIn PDF document text
- http://vincitydata.com/uploads/ckfinder/files/42687861688.pdfIn PDF document text
- https://10fci.org/userfiles/file/lusakikom.pdfIn PDF document text
- http://lustigersteirer.at/userfiles/file/zubivexivovikukuwe.pdfIn PDF document text
- http://luckdidea.com/ckfinder/images_store/files/patewokix.pdfIn PDF document text
- https://dimensioninteractive.com/WYSIWYGImage/file/xiwawibemawurewovetewuw.pdfIn PDF document text
- http://abwcoliseum.com/uploads/files/74961086313.pdfIn PDF document text
- https://adesso-moosburg.de/images/file/wigolobegibofakexipedon.pdfIn PDF document text
- http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bexuxejujusi.pdfIn PDF document text
- https://weboonline.com/ckfinder/userfiles/files/69219395970.pdfIn PDF document text
- http://jujucuisine.com/userfiles/file/lopeg.pdfIn PDF document text
- http://grandinhr.eu/images/user/file/xaraludupexewimodojuwif.pdfIn PDF document text
- http://lapmaymn.samdigroup.vn/app/webroot/upload/files/59885151533.pdfIn PDF document text
- https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409006c15e8---sonimenuwosuzulisujusaza.pdfIn PDF document text
- http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16140ac4561f8c---texudike.pdfIn PDF document text
- https://lanegarrett.net/userfiles/file/lenajifusobibi.pdfIn PDF document text
- http://otworz-biuro-podrozy.pl/userfiles/file/15390079527.pdfIn PDF document text
- http://deaprogettazioni.it/userfiles/files/53838824402.pdfIn PDF document text
- https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/28afe41931dcdd0ef329524adc66dc95/latedifurox.pdfIn PDF document text
- http://wxmx.cn/upload/ckimg/files/202109242329255723.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_off0000b153.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB153 | 11492 bytes |
SHA-256: 5b50cb7bb35503ce55b5966d56f91280542cc66d9d576fefcaf50022d388980f |
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font_01_sfnt_off0000cbe7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCBE7 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0000e3f9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE3F9 | 14472 bytes |
SHA-256: dcbcd01a4b4b44620facb51c58eeccd04ad711cd2008b56dedef810541f80bc1 |
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