PDF malware analysis — malicious · 7209276a0ec4875f

MALICIOUS

PDF

83.8 KB Created: 2021-09-16 16:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: cb8d12f038464932affad291f200b790 SHA-1: d15299b41cc15837e25ba7d0dcfa28f219807099 SHA-256: 7209276a0ec4875fb8ba79111be9a55fe0ce5ca30bc0300c9f12fcbea4641fa3

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous external URIs, many of which are part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The embedded JavaScript stream likely facilitates the redirection to these malicious URLs, aiming to trick users into downloading unwanted software.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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 https://oniceh.ru/uplcv?utm_term=idm+windows+7+full+crack PDF link annotation
- http://fese.in/ienupdimages/images/files/51556431920.pdfIn PDF document text
- http://pazzo.jp/js/upload/files/49527902571.pdfIn PDF document text
- http://fotostudiovaccari.it/userfiles/files/18899644058.pdfIn PDF document text
- https://tierlistei.ch/downloads/16920590775.pdfIn PDF document text
- http://twozonechickenlasvegas.com/uploads/files/38834084792.pdfIn PDF document text
- http://kursadowicz.pl/Upload/file/getijolumotozedefen.pdfIn PDF document text
- https://burragebrothers.com/demo/jolie/beta/userfiles/files/rovixudi.pdfIn PDF document text
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae134ef111---fomiviveramogofa.pdfIn PDF document text
- http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137983abbfbb---39098055470.pdfIn PDF document text
- http://sage-chem.com/image/files/20210903_141316.pdfIn PDF document text
- https://pensiunea-escape.ro/ckfinder/userfiles/files/16669860892.pdfIn PDF document text
- https://shunnasato.com/vorisopuxinawasubowaxurod.pdfIn PDF document text
- http://dalnoboy.net/data/filestorage/upload/files/27404837905.pdfIn PDF document text
- https://vivekanandbawwa.com/userfiles/file/2175948687.pdfIn PDF document text
- https://tootooair.com/FileData/ckfinder/files/20210909_A82CF8B33BF31131.pdfIn PDF document text
- https://comfort8889.com/upload/files/31182671275.pdfIn PDF document text
- https://quatden.vn/webroot/img/files/lowemiwajesoju.pdfIn PDF document text
- https://angel-juicer.com/FileData/ckfinder/files/20210908_7CAF4B8B16E0192F.pdfIn PDF document text
- https://cuatudongsaigon.net/uploads/files/geponelanebosaj.pdfIn PDF document text
- https://fond.ru/userfiles/file/fovafabovatem.pdfIn PDF document text
- http://naasschoolofmotoring.com/fckeditor/userfiles/file/jodajikopidikejewagow.pdfIn PDF document text
- http://sahrugs.com/userfiles/file/tojaxukutonuxejawiwoza.pdfIn PDF document text
- http://praguynakorn.com/praguynakorn/picture/datapro/files/gidukegamulijufegidop.pdfIn PDF document text
- https://kitapkaplama.com/upload/ckfinder/files/venizugun.pdfIn PDF document text
- https://pbpkrosno.com/fckfile/nebali.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_off0000e1ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1AD	10688 bytes
SHA-256: `104d5779f74c471efeaef18c572c9bad9b696bfddad123d03886da12f6303889`
`font_01_sfnt_off0000fa3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA3C	18220 bytes
SHA-256: `4173d2aacdf186c33f1b9e1074493d810c368c54cac7f0a8ea8a504a28fb34fe`
`font_02_sfnt_off00012981.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12981	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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