PDF malware analysis — malicious · e0397793f950a17a

MALICIOUS

PDF

85.8 KB Created: 2021-07-16 19:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 766d71746954e0ccc506e0e4e1d3f884 SHA-1: 4f25c27fb7102f96ad9ae41852d9b9f6e6820774 SHA-256: e0397793f950a17a734b88e258a457ae58f8aac2cca8d58a18dcc37c5f0a1d85

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability for client execution. The document contains a link farm pointing to numerous URLs, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The presence of multiple distinct hosts and disposable hosting patterns further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9849

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 https://lacecinella.com/writable/public/userfiles/file/49174618964.pdf In PDF document text
- http://albatrossmrn.com/konadnew/userfiles/file/vezezuruxi.pdfIn PDF document text
- http://learnersdigest.org/userfiles/file/35457408556.pdfIn PDF document text
- https://geneolock.com/locktactyuma/userfiles/file/4348972830.pdfIn PDF document text
- http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160742f7b8671f---81979469749.pdfIn PDF document text
- http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/xetobu.pdfIn PDF document text
- https://suksesunited.com/contents//files/63334635730.pdfIn PDF document text
- http://ewtch.com/upload/files/1847243184.pdfIn PDF document text
- https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/vn9fceetb48gksb933ccmkl0kl/vunosusuvogo.pdfIn PDF document text
- https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607400ea2fe76---fukawezifojapeko.pdfIn PDF document text
- https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/035dab94e13136eda74ebffe3aab979c/varimezuvutugenasuj.pdfIn PDF document text
- https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/b565c30e798a495dd9c114236b0910bf/9019996591.pdfIn PDF document text
- https://laflammerouge.ch/userfiles/files/19263943843.pdfIn PDF document text
- http://chatfieldfarms101.com/userimages/17132732845.pdfIn PDF document text
- http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d16557aa6---37562975357.pdfIn PDF document text
- http://csc028.com/userfiles/file/20210627080603_lsabr3.pdfIn PDF document text
- https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/92398c4cfbc5933cff0d135104e5716a/97081407682.pdfIn PDF document text
- https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/646d9aonpg44thbu06c8url22l/41494011927.pdfIn PDF document text
- http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a28ac8902d---xiwulugikojog.pdfIn PDF document text
- http://postelezmasivu-brno.com/ckfinder/userfiles/files/tigikopuwosawukijajo.pdfIn PDF document text
- http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3226bd7e4---jujiruwaroguw.pdfIn PDF document text
- https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/7e1c06957e2d6fe4242e143e148fae8e/tisexijamizanisetagulubi.pdfIn PDF document text
- https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/sojnvvd4pesaiqcvs9idtmljjq/fomunurororij.pdfIn PDF document text
- https://hazeloyun.com/calisma2/files/uploads/mepunemabakolunapabora.pdfIn PDF document text
- http://sola-brothers.com/userfiles/file/75325576661.pdfIn PDF document text
- https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/iu5p8utgi243a0m5iqdshbbc25/kekafekanabumitu.pdfIn PDF document text
- http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c916cc0f9---vadezimi.pdfIn PDF document text
- https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/68e911c7c8f4121fb6efbb0451b9f2c9/jakabujopowigefobowigufu.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=increase+in+wbc+count+is+calledPDF 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_off0000edd7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDD7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000105ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105EE	10640 bytes
SHA-256: `3037dfe9fd3ae2935b3fa113b05828b66238e50511937f65bd0373902f9bb2dd`
`font_02_sfnt_off00011e72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E72	16744 bytes
SHA-256: `735e5fdbcadef7274b95db575ef56e65431ee78269e09aa51173dfd2cf5c891c`

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