PDF malware analysis — malicious · 0e52acaf43d49ab1

MALICIOUS

PDF

96.1 KB Created: 2021-07-15 23:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 5f70e8754bd7c3b6e08b2cd4f7427cd7 SHA-1: c0055b9daef1a239730019fa614d68ed4221a046 SHA-256: 0e52acaf43d49ab13e76ecb1698b2b10ad5178bb0d4b46b14e0c292ca7bfd0b2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead the user to a compromised or phishing site.

Machine Learning

Nyx PDF Classifier malicious score 0.9806

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://ahha.az/userfiles/file/81882229833.pdf In PDF document text
- https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/c789e3660749b8c6b0bb5a244b236930/65303705133.pdfIn PDF document text
- http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd784e30f7---kitalobenaleviwok.pdfIn PDF document text
- http://webinaris.biz/ckfinder/userfiles/publics/files/31361539003.pdfIn PDF document text
- https://hosvagyok.hu/userfiles/file/vesukatetuxutovozanato.pdfIn PDF document text
- http://agcslohian.com/userfiles/file/35174738445.pdfIn PDF document text
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160933d305cffe---xanekotolamuxokexur.pdfIn PDF document text
- http://rollfactorytogo.com/uploads/files/mexojusubulixaboz.pdfIn PDF document text
- http://apexhealthnutrition.com/newerac2c/userfiles/file/59322285280.pdfIn PDF document text
- http://sahamit.net/userfiles/file/kegavunej.pdfIn PDF document text
- https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/05f86f30d3b2f00c00989fff10b34a5a/8671330830.pdfIn PDF document text
- http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16073bd3d9f597---3801241165.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/mulupilokedefovivozig.pdfIn PDF document text
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee74aa8c03c---48624716147.pdfIn PDF document text
- https://fibaquitaine.fr/cebatrama/userfiles/files/gelazetotoruwezelipelawa.pdfIn PDF document text
- https://noihoithanhtuan.com/media/ftp/file/7216403069.pdfIn PDF document text
- http://innovad-ltd.com/userfiles/file/69583423939.pdfIn PDF document text
- http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/27081652a7d8e51a26b349136f405d5d/48256494560.pdfIn PDF document text
- http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16094721e27fc2---witebusafe.pdfIn PDF document text
- http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed13a3950c2---75180717904.pdfIn PDF document text
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/2edc10e3f0261b7828333346bee920fe/fetejinuniketibe.pdfIn PDF document text
- https://goodline.by/userfiles/file/28782547113.pdfIn PDF document text
- http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/jg5f0ug2i93lf8679v4pa4vk22/tedezufefitetutiditebeg.pdfIn PDF document text
- http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bad89aa8104---16434296031.pdfIn PDF document text
- http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd8c73de20---68325615700.pdfIn PDF document text
- https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609b530aec353---vowozu.pdfIn PDF document text
- https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/0369021fe01b98830d21182cc39cd749/gedutilarilu.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=margin+of+safety+formula+in+unitsPDF 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_off0001100d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1100D	18680 bytes
SHA-256: `7fc1656c2b0365cd8f153842d9ec6576f25e643febcff486acdb67b2450c39c9`
`font_01_sfnt_off000141d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x141D9	10764 bytes
SHA-256: `8451faf4342792713372eef71e1614fb88698762634ff171811c09724b4d246d`
`font_02_sfnt_off00015aa3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15AA3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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