PDF malware analysis — malicious · 5c495529bdee7c4c

MALICIOUS

PDF

219.7 KB Created: 2021-06-29 02:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 314ba64f639080318dbc612eb2374d7c SHA-1: d71e29c1580b3bb21b2dfe1757d7340fa3c94bde SHA-256: 5c495529bdee7c4c7406c6e565ed23bbccd3c8add2f8d4a93aebda93d55f2487

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial security scans. Numerous external URLs are present, many pointing to compromised WordPress sites, suggesting a distribution network for malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9868

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://chcial.ru/uplcv?utm_term=aoac+official+methods+of+analysis+15th+edition+volume+2+pdf PDF link annotation
- https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160be3fdb1302d---difuzodajofunigu.pdfIn PDF document text
- https://argentinaproduct.com/ckfinder/userfiles/files/31648305513.pdfIn PDF document text
- http://esipro.fr/userfiles/file/pedudibe.pdfIn PDF document text
- http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5302fce3f8---45468016679.pdfIn PDF document text
- https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/6aa0086f771b810a11f29c5b8caf3dac/wudomaxumazomonubitalot.pdfIn PDF document text
- https://vietnaminsight.biz/ckfinder/userfiles/files/32590362749.pdfIn PDF document text
- https://ivanamihic.com//files/nuzegosebifo.pdfIn PDF document text
- http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16086c4a3cebdc---2153727900.pdfIn PDF document text
- http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160860a117f256---7322982478.pdfIn PDF document text
- http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41e103684c---jokaluruwadiwugodup.pdfIn PDF document text
- http://ghioroiu.ro/sites/default/files/file/7676418765.pdfIn PDF document text
- https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/9i22undrg7du75n0mkeeucc5ao/89737119989.pdfIn PDF document text
- https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/bd2c1dc8c0c164d688619f5bceaa2008/dadekaxuxogijuxizorekiti.pdfIn PDF document text
- https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/v11b8j3r0k6d1ql0dr7serjnt0/fijoguniguxujabivirodudam.pdfIn PDF document text
- http://wsp.pl/userfiles/file/kuxujufemuzonuvonulox.pdfIn PDF document text
- https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/c23d4ed7871062b547e5c6e9b30dfa78/68433037552.pdfIn PDF document text
- https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/83812d38ac9f0d6e35e305d77c6ca465/pasopomakewusezumonulot.pdfIn PDF document text
- http://writtenmail.com/upload_images/file/23248955431.pdfIn PDF document text
- https://cualuoihoanmy.com/uploads/userfiles/file/33944201484.pdfIn PDF document text
- http://bioterapiazabiegi.pl/obrazy/file/junefoxejeratasutupi.pdfIn PDF document text
- http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6b9250a07---78694485719.pdfIn PDF document text
- http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce4dc0628e2---xezezumabebetuximozazobeb.pdfIn PDF document text
- https://arhometutor.com/userfiles/file/25682635021.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_off0002fc9b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FC9B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000314b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x314B2	11352 bytes
SHA-256: `ab011b3b52e3e14960d85c59b067e92389a7df7e095d5ba12db9e1d67a4c6480`
`font_02_sfnt_off00032f6d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x32F6D	19360 bytes
SHA-256: `ec0ea6fe9ed54f2883342ba12c76fe3e914f65976a582e14a33f41326613047d`

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