MALICIOUS
180
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and is flagged by ClamAV as a phishing trojan. It also exhibits characteristics of a link farm hosted on potentially compromised or disposable domains, suggesting it's part of a phishing campaign. The document body's garbled nature prevents a direct analysis of its content, but the heuristics indicate a lure for invoice or payment-related scams, likely leading to a second-stage download.
Machine Learning
- Nyx PDF Classifier malicious score 0.9835
Heuristics 9
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Fake invoice / payment lure low SE_INVOICE_LUREDocument contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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 http://bigxra.com/uploadfile/file/2021051518581973499.pdf
- http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/zugifidubotatu.pdf
- http://mebell-city.ru/ckfinder/userfiles/files/23740563723.pdf
- https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/383b33d40ae3866ac701f03e7bc7bbe1/bitibilupegepavipibet.pdf
- http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/433c63e6bf95944d5098562343d5add8/sedovekovakupovefemosejet.pdf
- http://bigxra.com/uploadfile/file/2021052304065673499.pdf
- http://hiace-yoshikawa.com/js/upload/files/41336453598.pdf
- https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/bm9o8d9brjn6uop0ofigh27f83/11999327449.pdf
- https://ludifrance.fr/userfiles/file/zopejudefunogunojekerak.pdf
- https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/c9drqked84c2uk61digtb3hou1/59538869010.pdf
- https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/53481a862f61213d0a66a9d15644c49c/29745503417.pdf
- http://studiosiriosrl.it/userfiles/files/53562425199.pdf
- https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/17e5be6a9f1530d82361fa73357bb326/37331298911.pdf
- http://samafb.org/uploadfilefiles/libozavunipufosifubusivo.pdf
- http://serextion2006.com/js/upload/files/62519859202.pdf
- https://art-eria.pl/mandarynka/pliki/files/66224787264.pdf
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac2116a275---19714493356.pdf
- http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d3341f4de---96773186434.pdf
- http://hhtaitung.com/CKEdit/upload/files/lupilodoze.pdf
- http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae937bc25c---21914882455.pdf
- https://responsible-tourism-alliance.com/content_file/files/25659822792.pdf
- http://hiredriver.com/uploads/assets/files/kular.pdf
- https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109915238260---89235631165.pdf
- https://vinocastillo.hu/editor_up/36146830055.pdf
- https://curewelldiabetes.com/userfiles/file/28189831208.pdf
- http://crosswaysrecruitment.com/userfiles/file/67451389651.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=tally+erp+9+shortcut+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_off0000fd38.bin3725a2c2f8cb84d95eb829e73f4119fb99a3350cdb84ae5991aa3a7740467fa3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFD38 | 18280 bytes |
font_01_sfnt_off00012c95.bina6abf28e9caba47bc9b94b6fb9af2537932b7afb99a59010d0101256e4486d4e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12C95 | 10868 bytes |
font_02_sfnt_off000145ee.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x145EE | 16792 bytes |
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