MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file contains a large number of links pointing to other PDF files hosted on various websites, many of which appear to be compromised. This behavior is indicative of a link farm, potentially used for SEO manipulation or to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link farm.
Machine Learning
- Nyx PDF Classifier malicious score 0.9972
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://akapacha.com/userfiles/file/nuvafirefokatiduxu.pdf
- https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab2f97a3c5---lerinemanijarenivuwi.pdf
- http://granite1962.com/clients/869125/File/paromavudubotekupotaruba.pdf
- http://mistralizmiryonetim.com/uploads/file/nazomamitidewevumun.pdf
- http://healthywithhart.com/res/file/rubakutupalisafunuse.pdf
- https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/17e7905fcc3db464ac2ec50311d6635c/86072928820.pdf
- http://chono.mn/uploads/userfiles/files/magoladibawasirumumixa.pdf
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160850dfd548f7---devixe.pdf
- http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080bc3617893---95932737135.pdf
- https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/2657c4768b4bcc1e4db75c8c0f5cffdb/12200068292.pdf
- http://easternhoteljeju.com/FileData/ckfinder/files/20210616_B4BC10360F061011.pdf
- http://benardoutlite.com/admin/fckeditor/fckdata/file/polufu.pdf
- https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/a87b32beb41e03f54953c4127bc734b8/temetesupe.pdf
- http://venturahigh1967.com/clients/40640/File/98543455233.pdf
- http://ibshop.gr/uploads/_uploads/files/gogewejeluwalunu.pdf
- https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/79235879262.pdf
- http://datong-travel.tw/upload/ckeditor/files/20210728201548.pdf
- https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865ccc9c47f---muxadivozipo.pdf
- https://uzmanwebci.com/calisma2/files/uploads/jobawomuxafetitizuvatugak.pdf
- https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/ae45bcac24ec00221144a4f66b06ee04/97496075711.pdf
- http://medi-sen.com/files/files/77360826019.pdf
- http://mistral-paints.cz/userfiles/files/palaximobasozujagipa.pdf
- https://alshamiltrading.com/alshamilfiles/file/42218209773.pdf
- https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160729e00617c2---fekimedevekonuwonisa.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=maddi%27s+fridge+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_off0000f86a.binc1bb5cb8c465c80ea116a80f309e4223891f8607cb1ad644b5c3574b3f2a8dc2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF86A | 16856 bytes |
font_01_sfnt_off0001245e.bined6a206a007ee0bc384321da85e8677c000bc39c03d9f954d2d744c7ba7b71df |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1245E | 10332 bytes |
font_02_sfnt_off00013b93.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13B93 | 16792 bytes |
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