PDF malware analysis — malicious · da918ecaa359ad6f

MALICIOUS

PDF

75.8 KB Created: 2021-09-15 10:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: bae3e2372781ca089d971e4505f45467 SHA-1: eab8c84d98636376f8f9e658f453f32d6c5fd16e SHA-256: da918ecaa359ad6f30656fb37e4b187ebc0c3ea76152b0d9c506f0c856cd710a

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on compromised or disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed for SEO manipulation, likely to distribute malicious content or phish users. The embedded JavaScript, though not fully analyzed here, is a common vector for further exploitation in PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://chcial.ru/uplcv?utm_term=yomovies+xyz+movies PDF link annotation
- http://depcip.com/app/views/panel/ckfinder/userfiles/files/59691872852.pdfIn PDF document text
- https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416d10dd38d---7221176339.pdfIn PDF document text
- http://sincaremedicaltour.com/js/upload/59994895401.pdfIn PDF document text
- http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613407b9d724e---27277566977.pdfIn PDF document text
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410e2e3802d---51089363627.pdfIn PDF document text
- https://adtw1.elfjane.com/ckfinder/userfiles/files/pekezezivasosap.pdfIn PDF document text
- http://belean.pl/userfiles/file/3747315739.pdfIn PDF document text
- http://ahknchem.com/upload/files/donamikegowo.pdfIn PDF document text
- https://fix2go.info/userfiles/file/mimexidimewixobizirivax.pdfIn PDF document text
- https://millvalley.com/wysiwygfiles/file/42224584450.pdfIn PDF document text
- http://veterinariacomportamentale.it/userfiles/files/tafesimoguzekewigakeva.pdfIn PDF document text
- http://studiogiovannone.com/userfiles/files/zabanisedunewevetu.pdfIn PDF document text
- http://moscow-vernisage.com/files/files/61156907727.pdfIn PDF document text
- http://bud-med.eu/userfiles/file/visogek.pdfIn PDF document text
- http://fractinvest.com/uploads/file/34393882727.pdfIn PDF document text
- https://zahidnawaz.com/UploadedImages/image/23727905390.pdfIn PDF document text
- http://sotel-perm.ru/site/file/kigetiwazik.pdfIn PDF document text
- http://youandisagenix.com/ckfinder/userfiles/files/jorofuwotalexuvuwemigap.pdfIn PDF document text
- http://namhungholdings.com/uploads/ckfinder/files/90055532748.pdfIn PDF document text
- https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/8340bf18d2738ac3d3786626df522a80/80478489789.pdfIn PDF document text
- http://architettorobertafasola.eu/userfiles/files/basizadunikikabe.pdfIn PDF document text
- http://grgct.com/ckfinder/userfiles/files/28828009052.pdfIn PDF document text
- https://bednidhitraders.com/userfiles/file/22186353830.pdfIn PDF document text
- http://keacg.com/upload/files/wisedu.pdfIn PDF document text
- https://broadcasthub.com/ci/userfiles/files/4969398562.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_off0000c9e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9E8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e1fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1FA	16156 bytes
SHA-256: `f5a9f4c61b09e937adfeb322b57ee6b332930b83dc1bb9ada7aef9db761ae667`
`font_02_sfnt_off00010b25.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B25	10084 bytes
SHA-256: `d717048417fccd3f29242dc4f2ef4ccbf9911f165161f2f655574e969c9ae23f`

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