PDF malware analysis — malicious · 53ed4895994cc98c

MALICIOUS

PDF

73.4 KB Created: 2021-09-16 11:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: c04673a09a67c318225066589263cdf4 SHA-1: a021359e9f357fd7beb41e7fa52c99c27a35970f SHA-256: 53ed4895994cc98c716b1c99c820c537b97fc6d1eb402018ceef39244e6f77d9

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites for further exploitation or credential harvesting. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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
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 http://nissanotogovap.net/uploads/images/files/83077210094.pdf In PDF document text
- https://srilangkapools.com/contents/files/33784025096.pdfIn PDF document text
- http://www.yt333.com/userfiles/20210910/file/1631284229.pdfIn PDF document text
- https://energiadirect.pl/application/resources/ckfinder/userfiles/files/16805685931.pdfIn PDF document text
- http://oreade-breche.fr/userfiles/file/82484158411.pdfIn PDF document text
- http://parilka.by/var/upload/file/palosofumopagofix.pdfIn PDF document text
- http://instit.ac/ckfinder/userfiles/files/tezijebarafisixedu.pdfIn PDF document text
- http://ap116.ru/userfiles/file/zamelilisikep.pdfIn PDF document text
- http://michellenevinracing.com/FCKeditor/file/leberifogupazuvexagatif.pdfIn PDF document text
- http://computerdoki.hu/user/file/10895302109.pdfIn PDF document text
- https://cmoretv.com/userfiles/radapajunesonewowuzowipug.pdfIn PDF document text
- https://guenangequitation.fr/www/site/js/ckfinder/userfiles/files/76827844163.pdfIn PDF document text
- https://invest.pl/userfiles/file/1709733223.pdfIn PDF document text
- https://hetodon.com/fckeditorfiles/file/kixuvipapedozuwi.pdfIn PDF document text
- https://glozor.com/userfiles/file/71652798676.pdfIn PDF document text
- http://www.moyekolodin.com/files/xomovarob.pdfIn PDF document text
- http://sichera.eu/userfiles/files/78726715633.pdfIn PDF document text
- http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0a8261d37---66799318590.pdfIn PDF document text
- http://svazekobciorlice.cz/userfiles/file/tetulutuxe.pdfIn PDF document text
- http://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/dovofuvawovukanetoxewiba.pdfIn PDF document text
- https://sanghvicranes.com/staging/media/liluvijilaf.pdfIn PDF document text
- http://gabortech.com/admin/file/48902591470.pdfIn PDF document text
- http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc4a71c4d6---nudotazoja.pdfIn PDF document text
- http://winfielddeli.com/ckfinder/userfiles/files/worexakawube.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=times+new+roman+font+for+word+androidPDF link annotation
- 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_off0000bc45.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBC45	16968 bytes
SHA-256: `27f2c8ac6319a8b6e8d1613015efcfce59b38b3097adad69b69e023715aec2c2`
`font_01_sfnt_off0000e832.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE832	10516 bytes
SHA-256: `efdbb1d700ed255e6ebb584662ebb111c43d4c74a11a2cead325d57434058b2a`
`font_02_sfnt_off00010036.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10036	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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