PDF malware analysis — malicious · 336522c179e7a87e

MALICIOUS

PDF

78.5 KB Created: 2021-09-16 13:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 152fe49a5b92d4158f1d7e316bdc256c SHA-1: 48cb6676e4e5aa8457b73cf4c37aab2d5e5fd339 SHA-256: 336522c179e7a87e394df16bda56a5346cc5c775b7e6cb96930ef2c30651e7dc

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting, forming a link farm. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to host further malicious content or phishing pages.

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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=how+to+cast+android+to+laptop PDF link annotation
- https://walnutcreekguide.com/wysiwygfiles/file/18922918712.pdfIn PDF document text
- https://retrofitoman.com/ckfinder/userfiles/files/46748257547.pdfIn PDF document text
- http://builderall.info/userfiles/file/xepisamufubudozedi.pdfIn PDF document text
- http://burningspearmarketplace.com/js/ckfinder/userfiles/files/nisipoga.pdfIn PDF document text
- http://divorce-difficile.fr/userfiles/file/gurogasezomolapozomidajik.pdfIn PDF document text
- https://jungleflightchiangmai.jungle-flight.com/Uploads/files/35131844377.pdfIn PDF document text
- http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161345c427124f---56796026290.pdfIn PDF document text
- https://pacientes.quiroser.com/UserFilesQUI/file/52015394555.pdfIn PDF document text
- http://opusbiz.kr/data/editor/file/1510803330614207159e1e4.pdfIn PDF document text
- https://mhreng.com/userfiles/file/faxinazeze.pdfIn PDF document text
- http://wakesup.org/userfiles/file/rakizoki.pdfIn PDF document text
- http://hfnhsw.com/upload/files/82498559275.pdfIn PDF document text
- http://ncdesign.it/userfiles/files/29139878587.pdfIn PDF document text
- https://www.agcontraincendios.es/ckfinder/userfiles/files/wegexeloripozemazeleje.pdfIn PDF document text
- https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130df8910f41---4852497710.pdfIn PDF document text
- http://lezeckastenakosice.sk/upload/files/sogewogepobu.pdfIn PDF document text
- https://iva-vietnam.com/userfiles/file/1364678030.pdfIn PDF document text
- https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/65d1dad9817d6d292b0c7decc9babea2/2419206222.pdfIn PDF document text
- http://vpecargo.com/userfiles/file/10169511292.pdfIn PDF document text
- https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/8dvo13mclttm7qb73qcaqhe5i0/550273294.pdfIn PDF document text
- https://phnews.ro/files/file/64861099298.pdfIn PDF document text
- http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/gesuzivexuveposepoliririb.pdfIn PDF document text
- https://vatlieutaphu.com/upload/files/retopajoba.pdfIn PDF document text
- http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7460379a5---87325232959.pdfIn PDF document text
- https://snqrsl.quebec/upload/editor/file/mepuzu.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_off0000cd76.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD76	10452 bytes
SHA-256: `d89e3a0a73f5f1c24f3c5e380b4e6fb15d96ef7ec3a34ca9568bf77f479ca02e`
`font_01_sfnt_off0000e548.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE548	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fd5a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD5A	18148 bytes
SHA-256: `c97443a15e63362b15a015fa029cbebad76a67c636e249bb1d8ab47cf8aba8a5`

Open this report in the interactive analyzer, or submit your own file for analysis.