PDF malware analysis — malicious · ed5d76811de38f60

MALICIOUS

PDF

72.0 KB Created: 2021-09-12 11:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 263bb0a2f46586cdebb4950f6a8bdf56 SHA-1: babd0774a3e6d5eb73634ccefe0bbaf0e7c99e03 SHA-256: ed5d76811de38f60b12fec06bd461af05855e3b4224cd84a8df9e792ff24a76e

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security and deliver malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

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://catamma.ru/uplcv?utm_term=how+to+reset+a+motorola+phone+without+password PDF link annotation
- https://a-pointpro.com/cms/ckfinder/userfiles/files/16730533046.pdfIn PDF document text
- http://ver9ctrl.sonikgps.com/ckfinder/userfiles/files/bopabanesagexadu.pdfIn PDF document text
- https://master.plus/wp-content/plugins/super-forms/uploads/php/files/8caeedaff33fa6c9eb14fd66b26b3be1/tawerolajagewogevidik.pdfIn PDF document text
- https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16138e55e299d2---74259879635.pdfIn PDF document text
- https://kaptenhoki.info/contents/files/vigosexanejiwexisutudom.pdfIn PDF document text
- http://tetobox-budapest.hu/uploads/files/77096443288.pdfIn PDF document text
- http://mehmetrasimmutlu.com/icerik/file/didevaxisukimavepupolobop.pdfIn PDF document text
- http://opuspointpartner.com/ckfinder/userfiles/files/tarufatizulofivogevasajik.pdfIn PDF document text
- http://zrdb-drogbud.pl/Upload/file/91572038483.pdfIn PDF document text
- http://yonezawanet.jp/units/24250/zcycom/files/16925404918.pdfIn PDF document text
- http://coimbra.hu/uploads/ckfinder/userfiles/files/lawabizaxebegos.pdfIn PDF document text
- http://mengnuanua.com/app/webroot/files/files/57207574262.pdfIn PDF document text
- https://agri-mal.pl/userfiles/file/muwora.pdfIn PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161370d6aac9e8---wekapefefapid.pdfIn PDF document text
- https://jairdefreitas.com/ckfinder/userfiles/files/tesofuwokitipepenigefiru.pdfIn PDF document text
- https://dovolena-jiznicechy.cz/uploads/xiziluve.pdfIn PDF document text
- http://heizler.hu/files/file/kotoxepume.pdfIn PDF document text
- http://mondoacquapiscine.com/userfiles/files/volumekoferesejituja.pdfIn PDF document text
- https://mpksieradz.pl/upload/file/57863358350.pdfIn PDF document text
- http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f939526d50---36552617883.pdfIn PDF document text
- http://capitolmetrophysicaltherapy.com/files/files/86112007775.pdfIn PDF document text
- https://tonymusic.se/UserFiles/files/43368097658.pdfIn PDF document text
- http://naturalmis.com/userfiles/file/14421687105.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_off0000b8eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB8EB	15652 bytes
SHA-256: `de8921761a785da5db2a0c3dc85e4a51ed56e1f0bb087f8c07b5e0842346d260`
`font_01_sfnt_off0000e0cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0CF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f8e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8E6	10836 bytes
SHA-256: `aff256638557b677c1557d044b57fe999844fe9870000eb56364a7889d5a3bec`

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