PDF malware analysis — malicious · 3eb72f5f58b2e72a

MALICIOUS

PDF

78.8 KB Created: 2021-09-08 23:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: dfdfc892caf92530e84e147b5ad195d4 SHA-1: f09bef72bcb5013cbda5b047df44aa04246e8f34 SHA-256: 3eb72f5f58b2e72a996321c7ab847d7616c23a1bd63f0b92cd4311c5f47b55a6

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'Password-protected archive handoff' heuristic suggests the document is designed to trick users into believing they need a password to access content, a common tactic for phishing or malware delivery. Numerous URLs are present, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 7

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://queure.ru/uplcv?utm_term=monte+carlo+movie+watch+online+with+english+subtitles PDF link annotation
- http://bratislava.topenglish.sk/app/webroot/gallery/files/furete.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16137bad864920---51928059168.pdfIn PDF document text
- http://vasset.bg/userfiles/file/newakiwagulisojigikatuviv.pdfIn PDF document text
- https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131fa1d9a80a---gatalumuzi.pdfIn PDF document text
- http://ortopediaszombathely.hu/editor_up/90030922717.pdfIn PDF document text
- http://kronospan-mofa-hungary.hu/editor_up/77620486420.pdfIn PDF document text
- http://msinziniering.com/userfiles/file/zisadakekotebuf.pdfIn PDF document text
- http://naphogacomposite.com/upload/files/69876688854.pdfIn PDF document text
- https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/mdq0v6ief4ps5ss4sr850aq96a/63773586822.pdfIn PDF document text
- http://www.petercar0937494634.com/upload/img/files/24287990107.pdfIn PDF document text
- http://geraldinekilkelly.ie/12929147462.pdfIn PDF document text
- https://nationalshield-uae.com/userfiles/files/puniguzezip.pdfIn PDF document text
- https://starfoil-mail.nl/uploads/wysiwyg/60041231911.pdfIn PDF document text
- https://gifarlcm.com/upfiles/editor/files/96486117574.pdfIn PDF document text
- http://npas.ru/pic/file/pulesorewadusosezodoge.pdfIn PDF document text
- https://ebooksweb.net/files/file/88959278265.pdfIn PDF document text
- http://okeefesreef.com/ckfinder/userfiles/files/degojawijudozipevi.pdfIn PDF document text
- http://theexplorerthai.com/userfiles/files/devuduwetijidozuzo.pdfIn PDF document text
- https://olterus.info/contents/files/xotonimozibi.pdfIn PDF document text
- http://citygclub.com/ckupload/files/30788140061.pdfIn PDF document text
- http://botosani.ro/img/uploads/file/65165284866.pdfIn PDF document text
- http://delfosventures.net/userfiles/files/kugibuvuzawujusunulixoma.pdfIn PDF document text
- https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/fbc01ee7a1af39b147971b9bc715a9c4/wasudiwutajofi.pdfIn PDF document text
- http://sgrappresentanze.eu/userfiles/files/padewexowam.pdfIn PDF document text
- https://tonitomov.com/picture/file/86311059249.pdfIn PDF document text
- 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_off0000cbfb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCBFB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e412.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE412	11064 bytes
SHA-256: `46485400573807708594cb0c08d4829ab90a91e76dc32d0838c3c0996011c7b8`
`font_02_sfnt_off0000fdb9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDB9	17648 bytes
SHA-256: `886c96119f22e787f537bd9d6162ae51cbc4a6398679cba24f9580f6a660029f`

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