PDF malware analysis — malicious · 53c4bb62a4831932

MALICIOUS

PDF

74.9 KB Created: 2021-09-09 02:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 7f01d9a9aa84e9e6c69216c7b4628cf7 SHA-1: 666f0bc5940f1e24ce48440c482cbb09c8303d70 SHA-256: 53c4bb62a483193296140750d813a1c7e4baa8c28e545b91a6a7c5cf44f2ebd1

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external links, many of which point to disposable hosting and are likely part of a link farm, suggesting a phishing or malware distribution attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be instructing users to open a password-protected archive, a common tactic to bypass gateway security.

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
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://synerhu.ru/uplcv?utm_term=restauracion+de+fabrica+samsung PDF link annotation
- https://kimansion.com/uploads/file/17598272616.pdfIn PDF document text
- http://imobilestore.de/userfiles/file/24559818887.pdfIn PDF document text
- http://playonathletics.com/userfiles/file/xixabumegaborukoru.pdfIn PDF document text
- https://bokaichenyu.com/upload/files/befagufodewize.pdfIn PDF document text
- http://xn--spreewaldpension-lbben-9lc.de/meineBilderAlbertGrundschule/file/95440502344.pdfIn PDF document text
- https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/mejoti.pdfIn PDF document text
- https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613879f6182c4---nuwukosigi.pdfIn PDF document text
- http://atletika-pardubice.cz/files/file/35149201259.pdfIn PDF document text
- https://dewalt-naradi.cz/media/upload/editor/file/35912978247.pdfIn PDF document text
- https://www.gullyracing.it/admin/ckfinder/userfiles/files/bumilevol.pdfIn PDF document text
- http://ingatlantv.tv/userfiles/files/doponiboliwufob.pdfIn PDF document text
- http://eternoohydro.com/d/files/34908469537.pdfIn PDF document text
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136ffa24c539---52249296391.pdfIn PDF document text
- http://plncse.hu/php_data/file/85315048250.pdfIn PDF document text
- http://naturestuff.nl/siteimages/file/60203673595.pdfIn PDF document text
- http://rudolphalexander.com/uploads/files/vuwomunet.pdfIn PDF document text
- http://mosme.org/uploadfile/files/73761653164.pdfIn PDF document text
- http://epoxidice.ro/mm/file/fipusuvomoxob.pdfIn PDF document text
- https://cfacgroup.com/uploads/FCK_files/file/39318031703.pdfIn PDF document text
- http://glampingcaravan.com/userfiles/file/20210909070601.pdfIn PDF document text
- https://peoplesmodelinternational.com/ckfinder/userfiles/files/xejolipepijivomafidokese.pdfIn PDF document text
- http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/kemoxutuzenirexup.pdfIn PDF document text
- https://kozhikodedeaf.org/admin/my_files/file/60333577545.pdfIn PDF document text
- http://moto-bike.pl/userfiles/file/daganuvugebema.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_off0000c174.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC174	17112 bytes
SHA-256: `82803fdef7b93a17dce24d187924001be2a55e7db8b376f4f5bf21b94fa67265`
`font_01_sfnt_off0000ec7a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC7A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010491.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10491	11060 bytes
SHA-256: `541988e9de148e53097f1495d5979aef45edec4b091035a16b18b014ee7f9182`

Open this report in the interactive analyzer, or submit your own file for analysis.