PDF malware analysis — malicious · 945058626d42b4d0

MALICIOUS

PDF

88.6 KB Created: 2021-09-18 15:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 9b16171b0c91500990facda968a83698 SHA-1: d48bc4a42df600c8307cb19379461cf5e5d109c4 SHA-256: 945058626d42b4d027cc881107599c850a5d1cb75cc2c01635cd5ecbe81fc8c1

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm and employs a social-engineering lure to trick users into installing browser-related software. While no scripts were directly extracted, the nature of the lure suggests potential for JavaScript execution to facilitate further malicious activity, such as downloading a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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://medvor.ru/uplcv?utm_term=android+chrome+favicon PDF link annotation
- https://avigailpekelman.com/sites/default/files/file/wepukafigimexipetipodu.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/5n8s4k7haeviu2804las5anmsm/lekexuwesosegotetu.pdfIn PDF document text
- http://quaisetoiles.fr/img_pages/file/dojusavukema.pdfIn PDF document text
- https://chongtham68.com/app/webroot/uploads/files/kewexexefawig.pdfIn PDF document text
- https://hoangphatdanang.xetnghiemadndanang.com/uploads/image/files/tutavuwawug.pdfIn PDF document text
- http://vet-spb.com/userfiles/file/jefezexuz.pdfIn PDF document text
- http://laduses.nl/image/file/weximibugemerudepixute.pdfIn PDF document text
- https://arrayamed.com/userfiles/file/71543467092.pdfIn PDF document text
- http://testplanet.nl/uploads/files/51750801562.pdfIn PDF document text
- http://riasztoszolnok.hu/admin/fck_upload/file/dagusitawasifonu.pdfIn PDF document text
- http://lifecontinues.ru/images/files/9721311130.pdfIn PDF document text
- http://thebodyclubonline.com/userfiles/file/39344839001.pdfIn PDF document text
- http://www.mamafoundation.cz/ckfinder/userfiles/files/73102309083.pdfIn PDF document text
- http://starinviter.com/ckimagefiles/78224560161.pdfIn PDF document text
- http://broadgatecapital.com/userfiles/file/zitoxifivagugi.pdfIn PDF document text
- http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/27842654383.pdfIn PDF document text
- https://mzr-avocats.com/buddha/ckfinder/userfiles/files/98626029140.pdfIn PDF document text
- http://quanhoangtsi.com/upload/quangtri/files/gibumexo.pdfIn PDF document text
- https://nk-sostanj.si/files/file/88215183907.pdfIn PDF document text
- http://spbmedaks.ru/sites/default/files/uploads/8672472573.pdfIn PDF document text
- http://minhquoc.vn/ckfinder/userfiles/files/94154040527.pdfIn PDF document text
- http://meble-tk.pl/userfiles/file/46132154178.pdfIn PDF document text
- http://myhomeinparis.com/userfiles/files/59865511087.pdfIn PDF document text
- https://cakamuzejs.riga.lv/ckfinder/userfiles/files/bijafevurupefizenu.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_off0000f684.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF684	17960 bytes
SHA-256: `a5e234b9e56002076f647c2db0e4710699babda3ca39b32044006d0f89710f85`
`font_01_sfnt_off00012519.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12519	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013d30.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D30	10476 bytes
SHA-256: `ab45cce3e8aa132b192829f1fe77490b6c0c88431a00fb49a2b95742df74b7e6`

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