PDF malware analysis — malicious · 1f29ebf72eb20a39

MALICIOUS

PDF

72.0 KB Created: 2021-09-10 20:35:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: afb725ecd2e7d723781608b3ddbcbe18 SHA-1: 0081e4b5e10d5bcaca793091bae2ed0a94ac069a SHA-256: 1f29ebf72eb20a39448829b9c0ff8894edc169e2edea08e18e88956410125b76

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. This script is likely responsible for the external URI redirections observed, which are characteristic of phishing or malware delivery campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://laborke.ru/uplcv?utm_term=dota+2+minions PDF link annotation
- https://fedico.ca/upload/editor/file/jizisudotulanomiwigoge.pdfIn PDF document text
- https://webkapper.nl/ckfinder/userfiles/files/jimazozex.pdfIn PDF document text
- http://sirindhorn.net/upload/File/waxowevezisogegepemuti.pdfIn PDF document text
- http://emeat.ru/var/files/15719571861.pdfIn PDF document text
- http://machi-tomo.xyz/js/ckfinder/userfiles/files/13008793130.pdfIn PDF document text
- http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136656ca5c73---xiwavevujoveluzilesiwura.pdfIn PDF document text
- https://diedacorporation.net/freesiafiles/file/musatebunulodomag.pdfIn PDF document text
- http://www.accl-calibration.com/login/ckfinder/userfiles/files/89062240192.pdfIn PDF document text
- http://www.ags-sib.ru/ckfinder/userfiles/files/golekotibupofumukafat.pdfIn PDF document text
- http://zoo-foto.cz/userfiles/file/73714815556.pdfIn PDF document text
- http://malovanesklomh.cz/images/file/80483202127.pdfIn PDF document text
- https://alansglobalservices.com/ckfinder/userfiles/files/nugazezufojuminurud.pdfIn PDF document text
- http://girisimcilikproje.com/resimler/files/depuwowome.pdfIn PDF document text
- https://rts-wm.com/ckfinder/userfiles/files/kixonoperaduxixak.pdfIn PDF document text
- http://elencostruzioni.it/userfiles/files/68210883451.pdfIn PDF document text
- https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/6mqq7ugioh6223ttmdq7j0ppnc/74626235663.pdfIn PDF document text
- https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/84562296153.pdfIn PDF document text
- https://nabil-doukali.com/userfiles/file/dorobevevidodet.pdfIn PDF document text
- http://scales-center.com/shop/fck_file/file/famekabedafalob.pdfIn PDF document text
- https://gangnampools.com/contents/files/ronosafojilakik.pdfIn PDF document text
- http://fortwashington.abwingsmd.com/uploads/files/mebimudizizulabimolenenob.pdfIn PDF document text
- http://schokoladenbrunnen.de/idata/95217466727.pdfIn PDF document text
- http://aligokdemir.com/resimler/files/widit.pdfIn PDF document text
- http://kindergartenhelden.at/upload/file/fukewurorunojo.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_off0000ba5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA5F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d271.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD271	16508 bytes
SHA-256: `052df3812278a67ffc0f400d604befa7c9f054e043a094e6b66d3f81c2faac09`
`font_02_sfnt_off0000fc41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC41	10112 bytes
SHA-256: `30ef6af1b942b327e28c6948972c52a8eb6fc4efc468817f8e9420f90c2bb6e9`

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