PDF malware analysis — malicious · 7250e030b7385f2e

MALICIOUS

PDF

81.5 KB Created: 2021-09-17 21:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: a8df5e6140d73d31be74ca5109fb2176 SHA-1: f472b57a42f12fa27f50c1714da96f8d6de5a04f SHA-256: 7250e030b7385f2eba2af5ed12f780b07a3f17ecb4dee8e642a03655c7d54226

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9950

Heuristics 5

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.
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://inwebjor.ru/uplcv?utm_term=tennis+clash+mod+apk PDF link annotation
- http://reclameindex.nl/images/uploads/15322544158.pdfIn PDF document text
- https://inprovitecuador.com/ckfinder/userfiles/files/95786643722.pdfIn PDF document text
- http://twgo8.com/uploads/base/files/202109170543158588.pdfIn PDF document text
- https://812423.qqtogeljackpot2.com/contents/files/99086960164.pdfIn PDF document text
- http://jgbt.us/pds/userfiles/files/zadukerutomuludemigujep.pdfIn PDF document text
- http://xsteelstock.com/d/files/dexonilutorulinozovomi.pdfIn PDF document text
- http://myphamlulanjina.com/upload/files/62675298106.pdfIn PDF document text
- http://thuexe7cho.vn/upload/files/vifuxemuvisotulisavufoban.pdfIn PDF document text
- https://keyword-lda.pt/site/upload/file/zemozubunexojedeboz.pdfIn PDF document text
- https://geelaboba.dswip.com/ci/userfiles/files/18237245198.pdfIn PDF document text
- http://dakdekkersindex.nl/images/uploads/dipetalodivoxedu.pdfIn PDF document text
- https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/68180680539.pdfIn PDF document text
- http://pokebarslo.com/uploads/files/36086514393.pdfIn PDF document text
- https://naveenent.com/administrator/imagetemp/file/fezusokolobazigukigud.pdfIn PDF document text
- http://balony.dmuchance.eu/userfiles/file/wepojazogiwoden.pdfIn PDF document text
- https://mekongtransport.com/upload/userfiles/files/70166924810.pdfIn PDF document text
- http://botosani.ro/img/uploads/file/nusefezakavibaxe.pdfIn PDF document text
- http://parzenica-bialka.pl/userfiles/files/75572922450.pdfIn PDF document text
- http://hodori247.com/uploads/files/zufedofi.pdfIn PDF document text
- http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0a7e613d3---zejumamapatagigisuluzobik.pdfIn PDF document text
- https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b3bde324d---bimoxufibemek.pdfIn PDF document text
- https://swaarm.de/app/webroot/upload/files/38566430087.pdfIn PDF document text
- https://red-adlay.com/upload/files/puxigezorumiruregege.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c4e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC4E7	23820 bytes
SHA-256: `2639c4ed0fdb32e9f123f96bbe346cb93b1eabf39aa4626e6053486d79eb9a50`
`font_01_sfnt_off0000ffdb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFDB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000117f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x117F2	10636 bytes
SHA-256: `405b5a5e9a4b610ccbb1524844f84433e5fedc5f19389345c2a85fd874d86add`
`font_03_sfnt_off00013003.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13003	1680 bytes
SHA-256: `6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc`

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