PDF malware analysis — malicious · 290f401c2d9151fa

MALICIOUS

PDF

82.6 KB Created: 2021-09-11 08:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: b64e70e69e9aef9f66596ae04bdddabc SHA-1: c6a350945d455ce9a865c5340122183c9e0493f6 SHA-256: 290f401c2d9151fad4442b9077aff3402751bb400e87d30db4a78f4c6aba20f7

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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
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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://pixomot.ru/uplcv?utm_term=mit+ai2+companion+login PDF link annotation
- http://kuppersbusch.hu/userfiles/files/89838022652.pdfIn PDF document text
- http://nitexprofi.cz/userfiles/file/77691033755.pdfIn PDF document text
- http://plan.msu.ac.th/ckfinder/userfiles/files/97408445090.pdfIn PDF document text
- http://innobiztour.com/FileData/ckfinder/files/20210906_E454BBFF9B0F5219.pdfIn PDF document text
- https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/5737183e278eb968064ec7ec302c9115/9217320647.pdfIn PDF document text
- http://psychologkmalinowska.pl/ckfinder/userfiles/files/22021758857.pdfIn PDF document text
- http://adamlegal.com/userfiles/file/28853316179.pdfIn PDF document text
- https://fullprotec.com/ckfinder/userfiles/files/fesudedekoraladonir.pdfIn PDF document text
- http://cieplej.pl/imgturysta/file/31515032046.pdfIn PDF document text
- http://arci-mp.fr/admin/File/62086040791.pdfIn PDF document text
- http://otczenacts.com/media/files/33567288242.pdfIn PDF document text
- http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/36702037681.pdfIn PDF document text
- https://bloomeng.com/uploads/julusalap.pdfIn PDF document text
- http://m3hotels.com/userfiles/file/92445331346.pdfIn PDF document text
- https://careersourcechipola.com/files/public/pitewagifov.pdfIn PDF document text
- http://rainhouse.kr/data/editor/file/1433517112613b3f152fdd8.pdfIn PDF document text
- http://parikshitconstruction.com/uploads/28831431381.pdfIn PDF document text
- http://fiorenzuolatrack.it/userfiles/files/85701330671.pdfIn PDF document text
- http://reliancefla.com/admin/images/file/sazudofejis.pdfIn PDF document text
- http://elisa5888.com/shopadmin/upload/files/xesufaluv.pdfIn PDF document text
- https://grupo-kayros.com/userfiles/file/remanetodori.pdfIn PDF document text
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b06c79cda7---96640756967.pdfIn PDF document text
- https://jmclimatizacionhvac.cl/images/subidas/file/11044824019.pdfIn PDF document text
- https://eagle-aviation.com/userfiles/files/xusokuj.pdfIn PDF document text
- https://tybistanbul.org/resimler/files/5397175449.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_off0000ddea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDEA	10432 bytes
SHA-256: `d594a34cb21430d3602d9d8d56cef016718de65e38927dc59a4fea7053496cc9`
`font_01_sfnt_off0000f59c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF59C	18360 bytes
SHA-256: `469e3c0226d2b48d834df7e6dc1bcc97e13f50afae3c8fdc84f2e2f260e110f1`
`font_02_sfnt_off000124fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124FB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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