PDF malware analysis — malicious · 93b921bcfb3b399c

MALICIOUS

PDF

78.8 KB Created: 2021-09-21 16:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 9f7b11b86b1334f0250f20237d2b9525 SHA-1: d9f567c94929980ada3a56583186ea012188a897 SHA-256: 93b921bcfb3b399c1b461955277c7fb01915d14d1fb7eea214e70592a4325fb2

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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://yoga-privates.com/yoga-privates/file/49645065222.pdf In PDF document text
- https://youkuvpn.com/upload/files/79312826966.pdfIn PDF document text
- http://savaksangida.com/resimler/files/vusopovabunirumokanowo.pdfIn PDF document text
- http://phuocthuan.vn/images/pic/file/gisavanarod.pdfIn PDF document text
- https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/96585813114.pdfIn PDF document text
- https://siltri.com/fck_upload/file/razazavetu.pdfIn PDF document text
- https://westhygiene.hu/editor_up/jifuwepakazo.pdfIn PDF document text
- https://fleuriste79.fr/ckfinder/userfiles/files/fumefutubolibalixos.pdfIn PDF document text
- http://autovoda.ru/upload/files/98181861927.pdfIn PDF document text
- http://lechioutdoor.com/userfiles/file/29619643418.pdfIn PDF document text
- http://fygl.net/uploads/file/09090854438.pdfIn PDF document text
- https://www.tocbirsen.org.tr/ckfinder/userfiles/files/77226646742.pdfIn PDF document text
- http://fosterfreezesantarosa.com/uploads/files/93429646783.pdfIn PDF document text
- https://happyjourney.webtrails.in/ckfinder/userfiles/files/47389817378.pdfIn PDF document text
- https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140266d5ca96---86639160023.pdfIn PDF document text
- http://tieulongcopro.com/luutru/files/xabemufubisorux.pdfIn PDF document text
- http://plise.org/userfiles/file/lirevegutug.pdfIn PDF document text
- http://delannahotel.com/user_img/file/ratemag.pdfIn PDF document text
- https://safetypadlocks.eu/eurostyl/photos/file/taxitigobipipupezawamemap.pdfIn PDF document text
- https://qatarsecurityservices.com/public_html/userfiles/file/63248141723.pdfIn PDF document text
- https://consurs.ro/ckfinder/userfiles/files/tigipugekirajuxewor.pdfIn PDF document text
- http://emke.hu/uploads/ckfinder/userfiles/files/79220998679.pdfIn PDF document text
- https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/94669572026.pdfIn PDF document text
- https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/30866240140.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=offline+browser+android+app+downloadPDF 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_off0000d1a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1A2	10644 bytes
SHA-256: `e0cc2f23ec045dd74ec944291ffbb237d7e19718b329c8b7dc22ac8b17373a11`
`font_01_sfnt_off0000e9e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9E9	16976 bytes
SHA-256: `a4c5f428cfcfccb259ccaeb25351188239b7f2603054cb80d1f065ce0c78ebd9`
`font_02_sfnt_off00011586.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11586	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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