PDF malware analysis — malicious · 0d59adb331c8b685

MALICIOUS

PDF

84.0 KB Created: 2021-09-18 15:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 303d98d82c7ba93de48ec4904d3e709e SHA-1: b8e92547d72596c4dbda3b76e1d29648618d3744 SHA-256: 0d59adb331c8b685dbf0f1436c9b4f210f749c4c25e5d14c074ef0b5cc83bbaa

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous external links, many hosted on disposable domains, and presents a fake CAPTCHA to deceive users into clicking these links. The primary intent appears to be directing users to malicious websites for further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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://oniceh.ru/uplcv?utm_term=gta+5+skip+verification+link PDF link annotation
- http://yuanyoujie.vip/userfiles/file/wegijisawezowikizininuvav.pdfIn PDF document text
- https://eol.org.pe/ckfinder/userfiles/files/28026684743.pdfIn PDF document text
- http://mdcegy.com/app/webroot/img/fck/file/43135343910.pdfIn PDF document text
- https://jaukiaplinka.lt/ckfinder/userfiles/files/vakubo.pdfIn PDF document text
- http://lexuspolymers.com/assets/ckfinder/userfiles/files/16258859565.pdfIn PDF document text
- https://strings97.hu/userfiles/file/90856796424.pdfIn PDF document text
- http://cn-polylysine.com/d/files/83917943942.pdfIn PDF document text
- https://jackinthegymtpe.com/uploads/files/202109170302321413.pdfIn PDF document text
- https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135cc0df107e---fedusuretatizo.pdfIn PDF document text
- https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/e6bc9771304bff98113a9f8707247873/kumax.pdfIn PDF document text
- https://drishtinetcom.in/FCKeditor/file/79086554330.pdfIn PDF document text
- http://karat-dobremiasto.pl/userfiles/file/206130242.pdfIn PDF document text
- http://marcth.pl/media/fck/file/40481625313.pdfIn PDF document text
- https://sheenabusesandcoaches.com/userfiles/file/14611712160.pdfIn PDF document text
- http://loscogliodifavignana.it/userfiles/files/nakodakeni.pdfIn PDF document text
- http://zbigniewrodak.pl/galeria/file/suwerejuluparuvuzo.pdfIn PDF document text
- http://thaiboxes.com/piceditor/file/46154327920.pdfIn PDF document text
- http://phutungotodungha.com/img/files/16844552551.pdfIn PDF document text
- http://topp.pl/_topp/file/49152213143.pdfIn PDF document text
- http://eros-arena.com/eros/userfiles/file/11257374772.pdfIn PDF document text
- http://coytex.net/ckfinder/userfiles/files/niwurimofanowut.pdfIn PDF document text
- http://vin-baietii.ro/ckfinder/userfiles/files/48099669379.pdfIn PDF document text
- http://gleb777.com/fck_upload/file/17125097030.pdfIn PDF document text
- http://dfanchem.com/upload/files/vapoporururofu.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_off0000e2b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2B6	17888 bytes
SHA-256: `6f53e60b109abc612df6040fd3a667c189a57cd45090b41f69f385085342f781`
`font_01_sfnt_off00011113.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11113	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001292a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1292A	10804 bytes
SHA-256: `c20afee35b8b514b017a5a11b25cb32a09c5be1c6496d2082c87bc8fa3909628`

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