PDF malware analysis — malicious · ba349c81233307cb

MALICIOUS

PDF

71.3 KB Created: 2021-09-27 23:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21

MD5: 565b56e87570e37d4ec37ed541365a4d SHA-1: d69921dc8fd989b61dba4f99880c129dd4d1611b SHA-256: ba349c81233307cb4231ae5c4ecaafb794d370911a4b7a67f93cdfa37d151d11

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier with high confidence. It contains numerous external URLs, many pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a pattern of using disposable hosting and compromised sites to distribute malicious content. Although no scripts were explicitly extracted, the nature of the heuristics and the ML detection strongly suggest malicious intent, likely related to phishing or malware delivery via the embedded URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://huntic.ru/uplcv?utm_term=house+with+a+clock+in+its+walls+streaming PDF link annotation
- https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/5fb7aa7d12fefc35f9591f929357bf85/sakuvubirekurokexedamil.pdfIn PDF document text
- https://at1apigroup3.com/contents/files/wojetipijagega.pdfIn PDF document text
- https://butchercurnow.com/img/shop/contents/kaxubasunifu.pdfIn PDF document text
- http://wmc21.com/ckupload/files/28183987632.pdfIn PDF document text
- http://gandolfiarchitetti.com/userfiles/files/740483769.pdfIn PDF document text
- http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a9ccdf0ff---31508859175.pdfIn PDF document text
- https://nobelboya.com/userfiles/file/lekak.pdfIn PDF document text
- https://kochitaxirental.com/ckfinder/userfiles/files/kipisuf.pdfIn PDF document text
- http://cableesmaltado.com/d/files/19714192547.pdfIn PDF document text
- http://vanhacollection.com/images/files/81402600168.pdfIn PDF document text
- https://priscar.com/documents/files/37048387215.pdfIn PDF document text
- https://vzglavniki.net/data/file/78922865407.pdfIn PDF document text
- https://gkia.org/kingkong/userfiles/files/tilijawemelojarotafidofes.pdfIn PDF document text
- http://kliknetezde.cz/admin/obrazky/file/82225684358.pdfIn PDF document text
- http://monikaknoblochova.com/userfiles/file/56253149521.pdfIn PDF document text
- http://bosch-elektronarzedzia.pl/catalog/file/16114242357.pdfIn PDF document text
- https://materiale-parchet.ro/fisiere/file/wuletomososere.pdfIn PDF document text
- https://yifff.se/userfiles/file/82990795152.pdfIn PDF document text
- https://eownauto.com/uploadpic/files/tamefuzeparipenumudeforit.pdfIn PDF document text
- http://dtmaso.com/public_html/Imagens/file/tabedofuwukiwewuxunerus.pdfIn PDF document text
- https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/3341f7cc7db0546f9bfcf4da9b61c45a/58585182584.pdfIn PDF document text
- http://zeroseistudio.eu/userfiles/files/32029977509.pdfIn PDF document text
- https://eqonetech.com/upload/userfiles/files/fupowujiloxipuwuzivila.pdfIn PDF document text
- https://indianhairtransplant.com/ckfinder/userfiles/files/relujivemix.pdfIn PDF document text
- http://zkmeiqi.com/admin/ckfinder/upfile/files/93810388941.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_off0000b50c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB50C	10944 bytes
SHA-256: `feefe084a92acfd42ab3cf913a0eefa1487d837871135c37274af3358f5f6e95`
`font_01_sfnt_off0000ce49.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE49	16028 bytes
SHA-256: `8616b7d94c0dcf3bc3ec9b9a949096fcd5e5a9145945672bce6045e855ebb32c`
`font_02_sfnt_off0000f736.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF736	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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