PDF malware analysis — malicious · f011c824c85c9e22

MALICIOUS

PDF

72.4 KB Created: 2021-09-25 16:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 28b42a192755a1a51a18bfd249e22eca SHA-1: 43cd0d2601169b833d934099be70818f5f36db99 SHA-256: f011c824c85c9e222ea3ff441028c95c20a3c23fe4c9aa167ca619d3c8a1a818

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to PDF files on various domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting a phishing or malware distribution scheme. The embedded JavaScript is likely used to facilitate the redirection or download of malicious content.

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 http://tranindo.com/Uploads/userfiles/files/kemeseb.pdf In PDF document text
- https://mvmdigital.gr/files/files/57085138061.pdfIn PDF document text
- https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/gd9cf9e3t3110k5t7si9tl9tb6/telivutun.pdfIn PDF document text
- http://tfforming.ru/d/files/tewowamunamekadudoxoper.pdfIn PDF document text
- https://www.miotsukushi.or.jp/system/ckfinder/userfiles/files/11497655562.pdfIn PDF document text
- http://rrbrentacars.com/files/others/24704444739.pdfIn PDF document text
- http://pileshoppen.dk/userfiles/file/xabofuwagurofososibimug.pdfIn PDF document text
- https://dogathermalhotel.com/resimler/files/giminu.pdfIn PDF document text
- http://www.deewanalarab.com/up_imgs/91710051204.pdfIn PDF document text
- http://z-him.ru/userfiles/file/buvegukuzemibozerokot.pdfIn PDF document text
- http://cesnek-vysocina.cz/UserFiles/File/63200871976.pdfIn PDF document text
- https://www.nevjegykiraly.hu/userfiles/files/wegutedukiliv.pdfIn PDF document text
- http://gazduire-domeniu.com/UserFiles/file/vanawomuwilag.pdfIn PDF document text
- http://mosvag.ru/img/lib/file/58551534757.pdfIn PDF document text
- http://fluitec.fr/ressource/site-image/files/75820112908.pdfIn PDF document text
- http://discus-rus.ru/upl/file/dikakixemaxav.pdfIn PDF document text
- http://elliptical-trainers.ru/ckfinder/userfiles/files/zenitanetedobajoxa.pdfIn PDF document text
- https://client-sms.com/ckfinder/userfiles/files/tegamojasipivu.pdfIn PDF document text
- https://ryokanclub.com/FileData/ckfinder/files/20210915_6E97C9C04429F810.pdfIn PDF document text
- http://gesundimjob.at/images/content/files/30774295424.pdfIn PDF document text
- http://www.mousumibanerjee.com/fckimages/file/gotazovuletemabarovuwatu.pdfIn PDF document text
- https://keiba-like.biz/js/ckfinder/userfiles/files/foveludivadorebu.pdfIn PDF document text
- http://newbiesites.com/userfiles/file/woxetozuzotula.pdfIn PDF document text
- http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e7371d582---xolaxidedipivexoxafokelu.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=midnight+club+3+dub+edition+apkPDF 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_off0000b3e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB3E0	11020 bytes
SHA-256: `b18a99b4379e2f149f5cfce1e7852e739969b6de8513d9002f24961b21a37c2d`
`font_01_sfnt_off0000cd06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD06	18452 bytes
SHA-256: `3399a9f7779e7be922582cd9fd3b9a32670776eb3597c204090913670e539048`
`font_02_sfnt_off0000fc2d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC2D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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