MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous external URLs pointing to other PDF files hosted on various domains, some of which appear to be compromised CMS uploads. The presence of a 'link farm' heuristic and the sheer volume of external links suggest an attempt to distribute malicious content or conduct phishing by directing users to potentially harmful sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9822
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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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 http://hzjksj.com/images/upload/File/58272449666.pdf In PDF document text
- http://sochisushi.nl/survey/userfiles/files/90644075723.pdfIn PDF document text
- http://pnktools-th.org/ckfinder/userfiles/files/18002214881.pdfIn PDF document text
- https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/086e8dc32ce2b72467628cf1c0c86f2b/zulularegedipur.pdfIn PDF document text
- https://annjulieskarpmo.com/userfiles/file/nubagavasiraxabimem.pdfIn PDF document text
- https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/1q8kctt9aj6kkt5tqu2ke7lbs5/58069127185.pdfIn PDF document text
- https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb429ad596---keralobobovaxolurajozedoj.pdfIn PDF document text
- https://santchavarabed.in/ckfinder/userfiles/files/zavexu.pdfIn PDF document text
- https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/73684811106.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/nfjnen032m4t4geam4c9v4u644/41250833312.pdfIn PDF document text
- http://namngonviet.vn/user-/files/kadapagokukifoxiwe.pdfIn PDF document text
- http://bassbasement.org/userfiles/file/bekutalirujupoduzam.pdfIn PDF document text
- http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094941e64fc8---pomig.pdfIn PDF document text
- https://emotionalgift.com/ckfinder/userfiles/files/84519348.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/2a1cf44ca84b96752676fe2aedb2fce3/panavududemu.pdfIn PDF document text
- http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8707370045---12230175370.pdfIn PDF document text
- https://autotronics.vn/userfiles/file/muvejovigoluvofagelawegim.pdfIn PDF document text
- http://amuseonline.com/absite/userfiles/file/renalitizosimukalade.pdfIn PDF document text
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160daf2eb09191---56029801627.pdfIn PDF document text
- https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/77e4df05343a8a031d272b1e4a539b4d/tadidaburowekekubevej.pdfIn PDF document text
- https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f0629c3c3ce---fepezidizurawuturiv.pdfIn PDF document text
- https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607774a6b5ec6---wofoderu.pdfIn PDF document text
- https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/lmgmi5vl83vmq61c5f0in3ao71/3206559192.pdfIn PDF document text
- https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/81ue81kvr4dcqd0ljb8sb51fk1/61713577257.pdfIn PDF document text
- http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bc056e235---kuvikawelali.pdfIn PDF document text
- https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/0fe14dea6b99bbc2670fdba6e743c764/74975987602.pdfIn PDF document text
- http://szakkepzosiklos.hu/upload/file/kebesofudarinemudovo.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=numbness+on+one+side+of+facePDF link annotation
- 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_off0000faa0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFAA0 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off000112b7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x112B7 | 10608 bytes |
SHA-256: 3f50cf3f305cb4019566c44d1fb431974e7b11fa2b5c5cea4164fb174358054c |
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font_02_sfnt_off00012aee.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12AEE | 16612 bytes |
SHA-256: 6e84b0b358f131025a1d69d6d7af0918d4ae5dab38e2b4641b67932a6beb941f |
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