PDF malware analysis — malicious · 34403d5b9204ee02

MALICIOUS

PDF

82.3 KB Created: 2021-09-02 01:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 2f02fee3e7994714c76c79c6aeecca8c SHA-1: be61dc11855abbc098fd51e98b8bf6f157058504 SHA-256: 34403d5b9204ee02f3da7bf8bea1e972116d349d7582d03461e2d2bdf2452c52

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm pointing to compromised WordPress sites. These sites host further PDF files, suggesting a multi-stage distribution or phishing campaign. The presence of numerous links on disposable hosting and compromised CMS uploads indicates an effort to obscure the true origin and host malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9923

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF 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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small 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.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The 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.
Embedded URL info EMBEDDED_URL

One 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://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610661d24eace---17461847375.pdf In PDF document text
- https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/38322f690667dc7162886cd97b38f887/supalulamigewozuko.pdfIn PDF document text
- https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/605aaef7e1210120a0d41e14fb9c5ab8/33871024827.pdfIn PDF document text
- http://konemara.hu/userfiles/file/6699951183.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072309fd6f90---3447945523.pdfIn PDF document text
- http://richmore.kr/uploadfile/fckeditor/file/nunoxivopamafigutopagew.pdfIn PDF document text
- http://bike-aholic.com/UserFiles/file/97299324733.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/l3fki6jl4ch2nd5dfltaovdbf3/1850091398.pdfIn PDF document text
- http://hotelamadeustorino.com/userfiles/files/84098682891.pdfIn PDF document text
- http://kapsalonindex.nl/images/uploads/90397181849.pdfIn PDF document text
- https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6aacdcf56---65141093981.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c348c1d0f51---fazawagogufuxikukux.pdfIn PDF document text
- http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868d6563495---barerixefaf.pdfIn PDF document text
- http://zimaletto.com/uploads/file/62250680274.pdfIn PDF document text
- https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987f668e897---tekonaledo.pdfIn PDF document text
- http://bangdientunhk.com/upload/files/bojowoxe.pdfIn PDF document text
- https://bamor.org/userfiles/file/vuzuremumifixezagutamisop.pdfIn PDF document text
- http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04fe770c01---15246705949.pdfIn PDF document text
- http://honda-vo.com/upload/file/nekugujukegonakobaxukom.pdfIn PDF document text
- https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161013469e9d70---bemezawuzazig.pdfIn PDF document text
- https://etcbt.com/userfiles/file/38267174865.pdfIn PDF document text
- https://brs.jo/userfiles/files/rugevurigida.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6890a1b06---63243399745.pdfIn PDF document text
- http://www.valathors.com/ckfinder/userfiles/files/lugogisovofot.pdfIn PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4d874b151---larasosavofabikixolipeb.pdfIn PDF document text
- http://yulintimber.cn/d/files/funefarowudatujo.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=can+you+shower+with+thrive+patchPDF 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_off0000db5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB5B	17724 bytes
SHA-256: `9b73d39711a781845b62430ad715f24e36d7b17b333b811a79927a47a8d79b43`
`font_01_sfnt_off00010941.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10941	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012158.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12158	10824 bytes
SHA-256: `3938dd95dbd11de4ac2f83d3445d991b1d10c926b5241f78adfc765174b957a5`

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