PDF malware analysis — malicious · 6c32c50580b069f9

MALICIOUS

PDF

71.3 KB Created: 2021-09-23 18:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 514db8739c09eaadb3c5099d790577c6 SHA-1: 6c9564fc695226e0909ab1addd4b0332d0be9ff1 SHA-256: 6c32c50580b069f903af00a1c46744d754b49296d9cfa367e74b102a46c45a67

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains and appear to be part of a link farm. The primary attack pattern observed is the use of these embedded links to redirect users to potentially malicious websites, consistent with phishing or malware distribution campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=kill+shot+bravo+mod+apk PDF link annotation
- http://bctlorraine.org/userfiles/file/duroratoguseso.pdfIn PDF document text
- https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/kutuma.pdfIn PDF document text
- http://sirinthepgroup.com/userfiles/file/65395724719.pdfIn PDF document text
- http://kingsbrite.com/kingsbrite.com/userfiles/file/dulexekop.pdfIn PDF document text
- https://gogift-it.com/userfiles/files/pamisorukokugajom.pdfIn PDF document text
- http://lobi.md/userfiles/file/tibimigelobutube.pdfIn PDF document text
- http://jump360.co/upload/files/20210904075031.pdfIn PDF document text
- http://thecuriosityshot.com/89662610864.pdfIn PDF document text
- http://koala-al.com/d/files/dasowisigikubogefilamezi.pdfIn PDF document text
- http://to-kajihan.net/js/upload/files/43894348667.pdfIn PDF document text
- http://elitacasa.it/images/file/6638032858.pdfIn PDF document text
- http://akinmedikal.com/uploads/file/baleveseta.pdfIn PDF document text
- https://callmarkinvestments.com/callmark/files/potugotikelabojakudurami.pdfIn PDF document text
- https://netlandschool.cl/files/biselixojavajenutoxusivux.pdfIn PDF document text
- http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16042205671.pdfIn PDF document text
- https://enilubricant.hoakhanh.vn/uploads/image/files/55363579507.pdfIn PDF document text
- http://www.ap-arte.ro/fckupload/file/2329124223.pdfIn PDF document text
- http://gidromall.ru/img/uploads/file/95817636469.pdfIn PDF document text
- https://inprovitperu.com/ckfinder/userfiles/files/naxanurenevoredilo.pdfIn PDF document text
- http://wienbildarchiv.com/upload_files/files/figadifoteridilipotoni.pdfIn PDF document text
- https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/37077683612.pdfIn PDF document text
- http://issaproject.com/app/views/panel/ckfinder/userfiles/files/15930815514.pdfIn PDF document text
- http://sys-svinding.dk/userfiles/file/73881900970.pdfIn PDF document text
- https://fengshan-zhennangong.org/upload/ckfinder/files/balufib.pdfIn PDF document text
- http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dakovelitoruvevadu.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_off0000b651.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB651	10708 bytes
SHA-256: `ba2c3abb62604a9362f82f1647e9b89853b3fde4142f4f50540c28b165ca325e`
`font_01_sfnt_off0000cea9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEA9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e6bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6BB	16144 bytes
SHA-256: `dba96d695a91747ab790584b972a9b776808d906649b5a8b9ba03944394ac7ae`

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